Answer:codominance
Explanation:
Tell me if am wrong
The portion of the female reproductive tract in birds that directs the egg to the cloaca is the __________.
Answer:
overies
ovaries produce the egg cells, called the ova or oocytes. The oocytes are then transported to the fallopian tube where fertilization by a sperm may occur. The fertilized egg then moves to the uterus, where the uterine lining has thickened in response to the normal hormones of the reproductive cycle
Which statement best describes both insulin and glucagon? They both provide structural support, but only insulin is a carbohydrate. They both store energy, but only glucagon is a carbohydrate. They are both hormones that regulate blood-sugar levels. They are both hormones that help fight disease.
Answer:
They are both hormones that regulate blood-sugar levels
Explanation:
Insulin is a hormone that controls the blood glucose level. It released in the blood stream when the glucose level increases after eating food. It is produces by pancreas, insulin helps the glucose to enter the body's cells where it can either be stored for future use or can be used for energy.
Glcogen is produced by alpha cells of pancreas, it is a peptide hormone. Its main function is to raise the concentration of fatty acids and glucose in the bloodstream. It is one of the main catabolic hormone of the body
As per the above mentioned statements, the option 'They are both hormones that regulate blood-sugar levels' is the correct answer.
Answer:
They are both hormones that regulate blood-sugar levels
Explanation:
just took the test
Help!! Which of these are amphibians and which are reptiles? Tree frog Alligator Crocodile Salamander Newt Common lizard
Answer:
tree frogs → amphibians
alligator → reptile
crocodile → reptile
salamander → amphibians
newt → amphibian
common lizard → reptiles
(✿◠‿◠) hope this helps...
Answer: Hi!
These animals are reptiles:
Alligator
Crocodile
Common Lizard
Reptiles are cold - blooded animals. Their class includes snakes, lizards, crocodiles, turtles, and tortoises. They usually have dry, scaly skin, and typically lay soft-shelled eggs on land. Reptiles need to bask in the heat to keep their body temperature up. If their surroundings are cold, then their internal temperature drops.
These animals are amphibians:
Tree Frog
Salamander
Newt
Amphibians are cold blooded animals as well! They are small creatures that need water, or a moist environment, to survive. Most amphibians start off their life cycle in the water, and then transform into an animal with lungs and legs! Cool, right? The most known for this process are frogs and toads.
Hope this helps!
Which category of signal exerts its effects on target cells by binding to membrane-bound receptor proteins
Answer: Neurohormones
Explanation:
Neurohormones are chemicals produced by neuroendocrine cells which behave like hormones. They are released into the bloodstream unlike neurotransmitters that are released into the synaptic cleft.
The same neurohorome can have both functions (hormonal and neurotransmitter). Hormones are chemicals produced by the endocrine glands that move through the body in the bloodstream. They control many biological processes, including muscle growth, heart rate, hunger, and the menstrual cycle. A neurotransmitter is a biomolecule that enables neurotransmission, i.e. the transmission of information from one neuron (a type of cell in the nervous system) to another neuron, a muscle cell or a gland, via the synapse that separates them. The neurotransmitter is released from the synaptic vesicles at the end of the presynaptic neuron, towards the synapse, through the synaptic space and acts on the specific cell receptors of the target cell.
So, a neurohormone is a biomolecule that, like the neurotransmitter and the hormone, is responsible for an exchange of information between cells. The neuroendocrine cells that secretes de neurohormones are, in turn, half neurons, half endocrines, and are found both in the Nervous System and in other parts of the body. They bind to receptors located on the membranes of other cells. Unlike neurotransmitters that interact only with other neurons, neurohormones also interact with other cells. When a neurohormone enters a cell and binds to its receptor, it causes the receptor to change shape, allowing the neurohormone-receptor complex to enter the nucleus and regulate gene activity. The binding exposes regions of the receptor that can bind to specific DNA sequences. These sequences are found next to certain genes in the cell's DNA, and when the receptor binds to them, it alters their transcription levels.
The most obvious case is catecholamines, formed in the adrenal glands by chromaffin cells, which are modified neurons and they are released directly into the blood. In turn, they are also produced by neurons and act at the synapses.
____ is the theory that living organisms are composed of organic compounds that contain a vital force that is not present in nonliving matter.
a. Evolution
b. Natural selection
c. Vitalism
d. Homeostasis
Answer:
The answer is between a or b
but I strongly suggest the option a.
Evolution is the answer
what do you think distinguishes living and nonliving things?
Answer: All living things have all of the listed characteristics of living things, but nonliving things do not.
Explanation:
The steroid hormones cortisol and corticosterone are released by the _______ in response to the hormone _______.a. kidney; AVPb. adrenals; AVPc. kidney; ACTHd. adrenals; ACTH
Answer:
d. adrenals; ACTH
Explanation:
The steroid hormones cortisol and corticosterone are released by the adrenals in response to the hormone ACTH( Adrenocorticotropic hormone).
High levels of ACTH send signals to the adrenal gland receptors which stimulate the secretion of cortisol. The cortisol is helpful in controlling blood sugar levels, regulating metabolism and helping to reduce inflammation
Humans develop malaria after the injection of Plasmodium ____________________ into the bloodstream by an infected female Anopheles mosquito when she takes a blood meal.
Answer: sporozites
Explanation:
Malaria involves cyclical infection of humans by infected female Anopheles mosquitoes. In humans.
this mosquitos are parasites and they grow first in the liver cells and multiply, after which they grow in the red cells of the blood. When
Gametocytes a form of blood stage parasite is taken in during blood feeding by a female Anopheles mosquito they multiply by mating in the mosquito gut after which they form a sporozites after 10-18days. This sporozites moves to their salivary gland such that when they feed on human blood the sporozite plasmodium is injected into human body from where they move to the liver and begin their life cycle.
Identify the factors that cause magnetic stripes to form along the ocean floor. Select the two correct answers.
1 . Magnetic direction of rock changes as Earth s
magnetic poles drift.
2. Magma acquires the magnetic direction present on Earth when it hardens into rock
3. Plates move as new rock forms which causes magnetic direction to skew away from normal
4. Rock forming at the
oceanic ridge pushes older rock outward in both directions.
The factors causing magnetic stripes are ''magma acquires the magnetic direction present on Earth when it hardens into rock' and 'rock forming at the oceanic ridge pushes older rock outward in both directions'.
In ocean floors, magnetic stripes can be exposed in the upper part of the walls of the fracture zones.
The magnetic stripes are a type of symmetrical pattern on both sides of the mid-ocean ridges, which can be used to determine the periodicity of reversals of the magnetic field.
The magnetic stripes generate as the oceanic crust pulls apart when the magma rises to the surface at mid-ocean ridges and generates new bands of the ocean floor.
In conclusion, the factors that cause magnetic stripes are ''magma acquires the magnetic direction present on Earth when it hardens into rock' and 'rock forming at the oceanic ridge pushes older rock outward in both directions'.
Learn more in:
https://brainly.com/question/8176201
Magnetic bands along the ocean are caused when magma acquires the magnetic direction present on earth when the rock hardens and when rock formation on the oceanic crest pushes older rocks outward in both directions, as shown in options 2 and 4.
We can arrive at this answer because:
Magnetic bands form along with the separation between oceanic crust and magma.This happens above the mid-ocean ridges, which allows renewal of the seabed, which expands and generates new bands.As the oceanic crust separates, magma rises towards the surface, spilling over mid-oceanic ridges.In this case, the magma acquires the magnetic direction present on Earth as it cools, hardens, and becomes a rock.These rocks push older rocks up and down, making room for the creation of magnetic bands along the ocean floor.
More information:
https://brainly.com/question/21746424?referrer=searchResults
What is the difference between Inorganic and organic compounds?
O A Organic compounds contain lonic bonds and inorganic compounds contain covalent bonds.
OB. Organic compounds are produced naturally and Inorganic compounds are human-made.
OC. Organic compounds contain carbon and Inorganic compounds do not.
OD. Organic compounds are beneficial to the environment and Inorganic compounds are not.
Answer:
[tex]\Large \boxed{\mathrm{Option \ C}}[/tex]
Explanation:
Organic compounds contain chemically bonded carbon atoms, sometimes even hydrogen atoms to form hydrocarbons, and inorganic compounds do not contain these atoms.
Answer:C
Explanation:
The line goes through (-2,3) and (1,-3) find the slope?
Answer:
[tex] \boxed{ \boxed{ \bold {\blue{ - 2}}}}[/tex]Explanation:
Let the points be A and B
A ( -2 , 3 ) ⇒( x₁ , y₁ )
B ( 1 , -3 )⇒( x₂ , y₂ )
Now, let's find the slope:
Slope = [tex] \sf{\frac{y2 - y1}{x2 - x1} }[/tex]
plug the values
⇒[tex] \sf{ \frac{ - 3 - 3}{1 - ( - 2)} }[/tex]
When there is a ( - ) in front of an expression in parentheses , change the sign of each term in the expression
⇒[tex] \sf{ \frac{ - 3 - 3}{1 + 2} }[/tex]
Calculate
⇒[tex] \sf{ \frac{ - 6}{3} }[/tex]
⇒[tex] \sf{ - 2}[/tex]
Hope I helped!
Best regards!!
Answer:
m = -2
Explanation:
Step 1: Use slope formula to find slope
[tex]m=\frac{y2-y1}{x2-x1} =\frac{-3-3}{1-(-2)}= \frac{-6}{3} =-2[/tex]
Therefore the slope of the line is -2
Therefore the slope is -2
Mutagens are useful in biotechnology research for producing organisms with altered phenotypes. producing new organisms which have beneficial traits from two or more organisms. selecting genetic mutants resistant to radioactivity. removing undesirable traits from microbes. producing DNA fragments for cloning.
Answer:
The correct answer is A.
Explanation:
A mutagen changes the level of mutations that occur in the DNA either by affecting it physically or chemically. This helps researchers create different organisms with altered phenotypes according to what the research needs so that the genes can be investigated further under a controlled environment.
So the answer is A.
I hope this helps.
Three species of lizard, labeled A, B, and C, are being studied using molecular analysis by two research colleagues in different laboratories. The mitochondrial DNA of lizards A and B are compared and are found to differ by 0.1%. The ribosomal RNA of lizards B and C are found to differ by 0.02%. They compare their findings and conclude that lizard B is more closely related to C than to A. What is the flaw in their reasoning, and how can their analysis be improved?
A.They applied different mathematical formulas for their computations. They should recalculate using the same formulas.
B'They compared different molecules which have different mutation rates. They should compare same molecule in the lizards.
C.They only made one measurement each. They should repeat their measurements to reduce the uncertainty in their results.
D.They used different equipment for analyzing the molecules since they work in different labs. They should work in the same lab.
Answer:
The correct option is B
Explanation:
The biomolecule used in comparing lizards A and B is the mitochondrial DNA while that used to compare the same lizard B to another lizard C is the ribosomal RNA (rRNA). They should have compared the same biomolecules throughout by extracting the mitochondrial DNA of the three lizards and then proceed to sequence the whole genome of the lizards. After which they can now do a Global alignment (comparison) of the three sequences together. This procedure would have given them a more accurate information on there identity and similarity.
Which forms of muscular dystrophy are X-linked? a. Becker b. Duchenne c. Facioscapulohumeral d. A combination of Becker and Duchenne"
Answer:
The correct answers a and b.
The inheritance of Becker and Duchenne dystrophies are linked to the X chromosome.
Explanation:
Duchenne and Becker muscular dystrophies (DMD and BMD, respectively) are neuromuscular diseases characterized by progressive muscle atrophy and weakness, as a consequence of the degeneration of skeletal, smooth and cardiac muscles. Both muscular dystrophies are caused by mutations in the DMD gene, located on the X chromosome. This is the largest known human gene and it encodes a protein called dystrophin, which is expressed in muscle cells. The mutations responsible for DMD lead to a total absence of dystrophin, while those underlying DMB lead to an abnormal quantity and / or quality of the protein. In both cases it is common to find deletions of the gene.
Lipids commonly contain fatty acids. What are the two parts of a fatty acid? Check the correct answers below.
amino group
long chain of carbon and hydrogen
carboxyl group
R group
nucleotide
Answer:
b) long chain of carbon and hydrogen
c) carboxyl group
Explanation:
Answer:
B and C
Explanation:
Edg 2022
Which term means the crossing of two different species that share common genes? Group of answer choices hybridization mutation population recombination
Answer:
The correct answer will be option A (Hybridization ).
Explanation:
Hybridization seems to be the method of integrating various organisms different types to start creating a hybrid. A hybrid, or genetic defect, has been the outcome of human reproduction incorporating the characteristics of two individuals of different ethnicities, types, organisms as well as subspecies.Other preferences presented are not closely linked to either the contexts in question. So the answer to the above seems to be the correct one.
why do sporangiophores grow vertically whereas rhizoids grow downwards
Answer:
The sporangiophore grow vertically which is in an upward direction because it is positively phototrophic. This means that it grows towards the ray of light from the sun which is found above. This is usually due to the provision of solar(light) energy from the sun which is used for the photosynthetic processes of the plants
The rhizoides grow downwards because they are positively geotrophic. This means they grow according to the force of gravity which acts downwards.
Prior to implementing any significant change in the use of animals, what is the most important thing that the research team must do
Answer:
obtain IACUC approval for the change.
Explanation:
The most important thing that the research team must do is to obtain IACUC approval for the change. This is because the institutional animal care and use committee (IACUC) is a requirement for any institution using animals as test subjects for their research, teachings, and/or testing. This committee focuses on making sure that the animals are not being tortured or harmed and that the testing is done correctly.
A linear sequence of DNA nucleotides which provides the genetic information for a single characteristic is a _____. chromosome plasmid gene base pair
Answer:
Gene
Explanation:
This describes a gene or genotype -- the basic physical and functional unit of heredity.
Sarah wants to know which brand of nail polish lasts the longest without chipping. She buys 4 types of nail polish – Essie (which she normally uses,) Butter, OPI, and Sally Hansen. Every Sunday for 4 weeks she paints her nails with a different brand of polish and records how many days she lasts before she gets her first chip. She makes sure to use the same bottom coat and top coat with each type of polish, and she makes sure to do the same weekly routine each week so that her nails aren’t getting treated more roughly different weeks.
Answer:
This is an example of scientific investigation and all the elements that compose it.
Explanation:
Sarah is doing a scientific investigation regarding the nail polishes she uses. We can see this, because Sarah is using the elements that make up this type of investigation to reach a conclusion about the enamels. These elements are:
Independent variable: Element that influences the appearance of a controlled and evaluable result, such as the enamel that Sarah will use on her nails.
Dependent variable: Element that is influenced by the dependent variable and promotes the visualization of a result, such as the length of time that the enamels can remain on the nail without chipping.
Experimental group: Element that allows the study of the interaction of these variables and the result developed through it, such as Sarah's enamel marks.
Control group: Element where only the independent variable is applied. As the action of the dependent variable does not exist, the observed result is the same that would be perceived if the study was not taking place, such as the day when Sarah did not paint her nails.
Constant: Elements that are exactly the same throughout the experiment, such as the person who conducted it, the time the study will be carried out, the nail care routine and the lower and upper layers of the enamels used.
___ capture energy and convert it into a usable chemical form. ____ cannot make their own food.
Autotrophs capture energy and convert it into a usable chemical form. Heterotrophs cannot make their own food.
The scientific method often begins by asking questions about the natural world. Which of the following is an example of a scientific question? (2 points)How does fertilizer affect plant growth?Whats the best species of fish?Which color is best for wall paint?Who is the fastest person on the planet?
Answer: I would say that the first question "How does fertilizer affect plant growth?" would be the scientific question.
Explanation: That is because all the rest of the questions are questions that cannot be proved or tested by experimenting or finding proof. They can only be answered by subjective answers (opinions). Each person's answer to those types of questions will most likely be different and varied and therefore not scientific
A food chain consists of phytoplankton, zooplankton, shrimp, and herring. If the bacteria produces 173,000 kJm-2 year-1 of energy, the plankton contain 28,000 kJm-2 year-1 of energy, the shrimp contain 3,100 kJm-2 year-1 of energy, and the herring contain 150 kJm-2 year-1 of energy then what is the trophic efficiency between the primary and secondary consumers?
Answer:
The trophic efficiency between the primary and the secondary produces is 18.064 %
Explanation:
The trophic efficiency is the ratio or the fraction obtained by dividing the energy used for growth at a trophc level by the level of energy supplied at the the next lower trophic level.
The given parameters are;
The energy produced by the bacteria (primary consumer) = 173,000 kJ/(m²/y)
The energy contained in the plankton = 28,000 kJ/(m²/y)
The energy contained in the shrimp = 3,100 kJ/(m²/y)
The energy contained in the herring = 150 kJ/(m²/y)
Therefore, we have;
Energy supplied at the primary trophic level = 173,000 kJ/(m²/y)
The energy used for growth (contained) in the secondary trophic level (secondary consumer) = 28,000 + 3,100 + 150 = 31,250 kJ/(m²/y)
[tex]Trophic \ efficiency = \dfrac{Energy \ used \ for\ growth\ (Secondary\ consumer) }{ Energy \ Supplied \ (Primary \ consumer) } \times 100[/tex]
[tex]Trophic \ efficiency = \dfrac{31,250}{ 173,000} \times 100 = 18.064 \ \%[/tex]
What is the cause of the hydranencephaly? Select one: a. Aqueductal stenosis b. Subaranchoid stenosis c. Overproduction of CSF d. Internal carotid arteries blockage
Answer:
The correct answer is d.
Explanation:
Hydranencephaly is a rare congenital anomaly characterized by the absence and replacement of the cerebral hemispheres by cerebrospinal fluid and necrotic remains, with preservation of the membranes (leptomeninges), within a skull of normal capacity and shape. It is the most severe form of cortical destruction cerebral bilateral and is considered an extreme form of porencephaly (focal cystic cavity). It mainly affects the territory of the internal carotid artery and middle cerebral artery, with preservation of the territories supplied by the vertebrobasilar arteries. The most accepted etiology is carotid vascular insufficiency, due to multiple causes (bleeding, placental thromboembolism, arteritis, vascular malformations, among others).
What ppb refer to regarding water testing
Answer:
On January 22, 2001, EPA adopted a new standard for arsenic in drinking water of 0.01 mg/l or 10 parts per billion (ppb), replacing the old standard of 50 ppb. Water systems had to meet the new standard by January 23, 2006.
Explanation:
Answer:
Answer:Water testing is a broad description for various procedures used to analyze water quality. Millions of water quality tests are carried out daily to fulfill regulatory requirements and to maintain safety.
Answer:Water testing is a broad description for various procedures used to analyze water quality. Millions of water quality tests are carried out daily to fulfill regulatory requirements and to maintain safety.Testing may be performed to evaluate:
Answer:Water testing is a broad description for various procedures used to analyze water quality. Millions of water quality tests are carried out daily to fulfill regulatory requirements and to maintain safety.Testing may be performed to evaluate:ambient or environmental water quality – the ability of a surface water body to support aquatic life as an ecosystem. See Environmental monitoring, Freshwater environmental quality parameters and Bioindicator.
Answer:Water testing is a broad description for various procedures used to analyze water quality. Millions of water quality tests are carried out daily to fulfill regulatory requirements and to maintain safety.Testing may be performed to evaluate:ambient or environmental water quality – the ability of a surface water body to support aquatic life as an ecosystem. See Environmental monitoring, Freshwater environmental quality parameters and Bioindicator.wastewater – characteristics of polluted water (domestic sewage or industrial waste) before treatment or after treatment. See Environmental chemistry and Wastewater quality indicators.
Answer:Water testing is a broad description for various procedures used to analyze water quality. Millions of water quality tests are carried out daily to fulfill regulatory requirements and to maintain safety.Testing may be performed to evaluate:ambient or environmental water quality – the ability of a surface water body to support aquatic life as an ecosystem. See Environmental monitoring, Freshwater environmental quality parameters and Bioindicator.wastewater – characteristics of polluted water (domestic sewage or industrial waste) before treatment or after treatment. See Environmental chemistry and Wastewater quality indicators."raw water" quality – characteristics of a water source prior to treatment for domestic consumption (drinking water). See Bacteriological water analysis and specific tests such as turbidity and hard water.
Answer:Water testing is a broad description for various procedures used to analyze water quality. Millions of water quality tests are carried out daily to fulfill regulatory requirements and to maintain safety.Testing may be performed to evaluate:ambient or environmental water quality – the ability of a surface water body to support aquatic life as an ecosystem. See Environmental monitoring, Freshwater environmental quality parameters and Bioindicator.wastewater – characteristics of polluted water (domestic sewage or industrial waste) before treatment or after treatment. See Environmental chemistry and Wastewater quality indicators."raw water" quality – characteristics of a water source prior to treatment for domestic consumption (drinking water). See Bacteriological water analysis and specific tests such as turbidity and hard water."finished" water quality – water treated at a municipal water purification plant. See Bacteriological water analysis and Category:Water quality indicators.
Answer:Water testing is a broad description for various procedures used to analyze water quality. Millions of water quality tests are carried out daily to fulfill regulatory requirements and to maintain safety.Testing may be performed to evaluate:ambient or environmental water quality – the ability of a surface water body to support aquatic life as an ecosystem. See Environmental monitoring, Freshwater environmental quality parameters and Bioindicator.wastewater – characteristics of polluted water (domestic sewage or industrial waste) before treatment or after treatment. See Environmental chemistry and Wastewater quality indicators."raw water" quality – characteristics of a water source prior to treatment for domestic consumption (drinking water). See Bacteriological water analysis and specific tests such as turbidity and hard water."finished" water quality – water treated at a municipal water purification plant. See Bacteriological water analysis and Category:Water quality indicators.suitability of water for industrial uses such as laboratory, manufacturing or equipment cooling.
"If the time period were extended to 6 hours, what would the expected blood glucose level for Person A?"
Explanation:
4 ->130
6 ->x
x=(130×6)÷4=195
In the given question, it says that If the time period were extended to 6 hours, the expected blood glucose level for Person A would be around 110-120 ml/L.
In this case, time is an independent variable whereas glucose level is the dependent variable as it depends on the time which means it changes according to the change in time.
On the basis of the given table,
there is a graph attached in which at x-axis the independent variable is represented and at the y-axis, there is the dependent variable and in respect of person, A and B graph is represented.The graph shows that that the blood glucose is dropping slowly for person A and begin to level off.on the basis of this revelation, it can be assumed that there would be a further drop of 10 to 20 units in the next two hours.
Learn more about glucose levels:
https://brainly.com/question/20377689
Rebekah is studying a molecule and trying to determine if it is DNA or RNA. Which kind of molecule is she studying? I NEED HELP PLZ PLZ PLZ
Answer: Rebekah is studying [C-nucleic acids].
Explanation: This is since both DNA (DeoxyriboNucleic Acid) and RNA (RiboNucleic Acid) contain nucleic acids, as their names show.
Answer:nucleic acid
Explanation:
The process whereby phosphorus is drained away into ground water is called
agriculture
decomposition
leaching
sedimentation
Answer:
When soluble soil nutrients from the soil are washed away due to to effects of rain,floods or irrigation from agricultural practices the process by which this occurs is called LEACHING. As water molecules pass through different soil layers,soluble soil minerals are dissolved and carried by the water into the ground water.
Phosphorus is a soluble mineral which is easily carried away by the passing water molecules,and therefore drained from plants' roots.
if these were leached into rivers and drinking water,this may affect the water supply of the community as the percentage of Phosphorus increases in the water especially if NPK fertilisers were used.
In addition, some important solid nutrients are also leached into the underground soil layer leading to deficiencies in the plants.
Explanation:
Facts about human brain
Answer:
The human brain is the largest brain of all vertebrates relative to body size. It weighs about 3.3 lbs. The average male has a brain volume of 1,274 cubic centimeters. The average female brain has a volume of 1,131 cm3. The brain makes up about 2 percent of a human's body weight.
Explanation:
As a professional teacher explain to the teacher three (3) advantages and three (3) disadvantages of using a resource person in handling the First Aid lesson
Answer:
Advantages of using a Resource person.
1. Resource person help to add to knowledge and information to the topic or subject the learners will learned.
2. Resource person help to save time for preparing the lessons to teach students.
3. With the presence of resource person, part of the course or topic do not need to be prepared for by the teacher.
Disadvantages of resource person.
1. There will be need for the teacher to improvise and not teacher learner what they need to know if the resource person don't show up.
2. The need to arrange for resource person might take time to.
3. Resource person pay demand might be high or much.
Explanation:
A resource person is an expert or person use in teaching lessons to learners that add to teaching information , knowledge and opinions in a learning environment so that learner's will get adqeuate information needed to understand to course or topic.
Advantages of using a Resource person.
1. Resource person help to add to knowledge and information to the topic or subject the learners will learned.
2. Resource person help to save time for preparing the lessons to teach students.
3. With the presence of resource person, part of the course or topic do not need to be prepared for by the teacher.
Disadvantages of resource person.
1. There will be need for the teacher to improvise and not teacher learner what they need to know if the resource person don't show up.
2. The need to arrange for resource person might take time to.
3. Resource person pay demand might be high or much.