Explanation:
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[tex]\huge\boxed{\fcolorbox{white}{pink}{Cell\:theory:}}[/tex]
[tex]<font color = purple >[/tex]According to the cell theory ,cell is the basic structural and functional unit of life all organisms are made of cells.New organisms originate from pre existing organisms.These are three fundamental postulates of cell theory.
Why are conditional alleles useful in studying genes with functions in essential cell processes?
Answer:
Conditional genes enable to study the gene function by manipulating the gene of interest
Explanation:
Conditional alleles are widely used in molecular genetics to study gene function in target tissues or developmental stages. A conditional allele can be produced by introducing two recombinase recognition sites (SRSs) at flanking regions of the target gene, thereby deletion/inversion of these sites induced by a specific recombinase will produce a null allele. Generally, conditional alleles are designed by introducing LoxP sites flanking the gene of interest; however, classical gene targeting methods (i.e., by homologous recombination) have been historically used in order to produce conditional alleles.
observable features of giant land snail
Answer: The shell of the giant African snail reaches up to 7.8 inches in length and 2.7-3.9 inches in height. An adult weighs about 32 grams. The body has two short tentacles and two long ones that have the eyes. The shell has an appearance conical and narrow, with 7 to 9 spirals visible on its surface.
Explanation:
Green pigmented plastids that function in photosynthesis are called
Answer:
Green pigmented plastids that function in photosynthesis are called Chloroplasts
Corporations measure their wealth in revenue. True False
Answer:
false
Explanation:
A main goal of most environmental scientists is to
achieve
a. cost-benefit balance
B. supply and demand
C. sustainability
D. biodiversity
The main goal of most environmental scientists is to achieve sustainability. Thus, the correct option is C.
What is the primary work of environmental scientists?The primary work of environmental scientists is to identify and remove numerous types of pollution and their consequences that eventually harms the whole environment to a larger extent.
In environmental aspects, Sustainability is something that deals with the problems, resources, impacts, etc. of global measures with respect to the present and future need of the community.
It is the major goal of most environmental scientists in order to deliver the most prominent, valid, and accurate solution to all the major problems that make the life of living organisms a better one.
Therefore, the main goal of most environmental scientists is to achieve sustainability. Thus, the correct option is C.
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What would be the long-term effect of the lymphatic vessels associated with a capillary bed were to become blocked?
a) More fluid would enter the venous capillaries.
b) Blood pressure in the capillary bed would increase.
c) Fluid would accumulate in interstitial areas.
d) Fewer proteins would leak into the interstitial fluid from the blood.
e) Nothing would happen.
Answer:
The accumulation of more fluid in the interstitial areas (C).
Explanation:
I'm currently in this class, this was correct.
Two students are working together to build a birdhouse. Student 1 applies a force of 10 N to a wooden board in order to slide it across the table to Student 2. If the force of friction resisting the student's push is 4 N, what is the net force acting on the board? A) 4N B) GN C) 10 N D) 14 N
Answer:
Net force acting on the board = 6 N
Explanation:
Given:
Force acting by student 1 = 10 N
Force acting by student 2 = 4 N
Find:
Net force acting on the board
Computation:
Net force acting on the board = Force acting by student 1 - Force acting by student 2
Net force acting on the board = 10 N - 2 N
Net force acting on the board = 6 N
Answer: 6N
Explanation:
In a step-by-step manner, explain how the voltage-regulated channels produce an Action Potential?
Answer:
The following are the steps illustrating the production of an action potential via the voltage-regulated channels:
1. First, the hypo-polarization of the stimulus takes place.
2. The opening of sodium cation gates takes place, resulting in the diffusion of sodium ions within the cell.
3. The threshold is attained at -55 mV, positive feedback takes place, that is, more opening of Na+ gates takes place, and thus, more diffusion of Na+ ions takes place within the cell resulting in depolarization.
4. The closing of Na+ ions gates occurs and the opening of K+ ions takes place.
5. Repolarization occurs resulting in hyperpolarization.
6. With the closing of K+ gates, the returning of resting membrane potential takes place.
Please state two similarities between Plasmolysis and haemolysis
Answer:
they both occur in living cells
both processes can lead to the death of the cells concerned
Bree Wakefield is a 19-year-old college student, living in a dormitory on the campus of her university. She started to feel poorly and began to miss classes. She went to the student health center and was immediately referred to the hospital. She was diagnosed with a disease of the CNS - these are her symptoms:
● Fever
● Stiff neck
● Drowsiness
● Vomiting
● Severe headache
● Rash
● Light sensitivity
● Beginning stages of kidney failure
Answer:
Explanation:
After seeing her symptoms at the student health center, she was immediately referred to a hospital. In the hospital she was diagnosed with a disease of CNS (central nervous system). The primary cause of a CNS infection is a result of the communication of an infectious disease. In these diseases, some are contagious and spread easily among the people and other types are also infectious and spread by pathogen organisms.
Step 2
Based on the symptoms of stiff neck, fever, vomiting, and light sensitivity, she was suffered by the meningococcal meningitis. The reason behind this diagnosis is that these symptoms are majorly impacted this diagnosis. Meningococcal meningitis is a bacterial form of meningitis. It is an infectious disease caused by Neisseria meningitidis bacteria. It is a serious infection of the thin lining that surrounds the brain and the spinal cord.
Step 3
Initial diagnosis of the meningococcal meningitis disease can be made by the clinical examination followed by a lumbar puncture (spinal tap) showing a purulent spinal fluid. The bacteria can be seen in the microscopic examination of the spinal fluid. Lumbar puncture is a medical procedure (test) in which a needle is inserted in the spinal canal ...
If you have a density of 100kg /L and a mass of 1000 units , tell me the following : First what are the mass units
Answer:
Mass units are equal to Kg
Explanation:
As per the requirement of the question, the data provided to compute the mass units is
Density = 100 Kg/L
Mass = 1000 units
According to the given situation, the mass units is presented below:-
As we know that the
Mass units are equal to Kg
Therefore, for determining the mass units we simply equal the Kg.
Which of these cytokines are involved in the differentiation of the different formed elements of the blood?
A. interleukins
B. Hematopoietic cytokines
C. interferons
D. Tumor necrosis factors
Answer:
B. Hematopoietic cytokines
Explanation:
The cytokines that are involved in the differentiation of the different formed elements of the blood called the Hematopoietic cytokines.
The Hematopoietic cytokines are classified as extracellular ligands. They help in the stimulation of hematopoietic cells (which are cells which form the blood) to differentiate it into the main types of blood cells.
A student completed a lab report. Which correctly describes the difference between the "Question" and "Hypothesis"
sections of her report?
Answer:
A question is what your looking to solve in the experiment, and a hypothesis is a possible explanation to that question.
Explanation:
The question is usually one of the first steps you do when setting up an experiment, as it is what you are looking to solve. The hypothesis can change throughout the experiment as more details come up, but in the beginning of the experiment it is a proposed explanation based on limited proof.
I hope this helps!
-The Business Man
Which of the following statements is true regarding
analytical learners?
They tend to overlook details.
They readily identify patterns.
They are multitaskers.
They see the whole organism first.
Answer:
they tend to overlook details
The statement that is true regarding the analytical learners is that they readily identify patterns. The correct option is B.
What is analytical learners?Analytic Learners are most interested in learning new and accurate facts that will help them understand concepts and processes.
They learn by reflecting on their experiences, assessing the accuracy of what they encounter, and scrutinizing details.
Learning analytics has the potential to transform the way we measure impact and outcomes in learning environments, allowing providers to develop new methods of achieving excellence in teaching and learning.
While also providing students with new information to help them make the best educational decisions.
Global learners When the information is relevant to their lives, they actively participate. They prefer to be at ease while reading and comprehending information.
Thus, the correct option is B.
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Why are male cats unable to express both orange and non-orange colors simultaneously in the same way as female cats?
O male cats only have one X chromosome
O only female cats inherit non-orange genes
O male cats have a dominant Y chromosome
only female cats inherit orange genes
The gene that codes for orange/non-orange color is X-linked. Female cats can express orange and non-orange simultaneously. Males, who only have one X chromosome, can express either orange or non-orange.
-----------------------------------------------
Male cats can only express one or two coat colors, but not three as females do. The combination of three simultaneous colors seems to be exclusive for females.
In cats, hair color is coded by different genes. In the particular case of orange color, we are referring to a codominant, diallelic, X-linked gene. Chromosome Y does not have an associated gene for the orange color.
The orange gene is diallelic, being
O the dominant allele ⇒ codes for orange ⇒ inhibits the expression of blacko the recessive allele ⇒ codes for not-orange ⇒ allows the expression of blackMales, who carry only one X chromosome, can be either
orange ⇒ X⁺Y (Where + symbol represents the dominant allele O)non-orange ⇒ X⁻Y (Where - symbol represents the recessive allele o)But, since females carry two X chromosomes, they can express either
orange ⇒ H0m0zyg0us dominant ⇒ X⁺X⁺ non-orange ⇒ H0m0zyg0us recessive ⇒ X⁻X⁻ combination of black and orange ⇒ Heter0zyg0us ⇒ X⁺X⁻----------------------------------------
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The diagram below represents an energy pyramid.
Consumer 3
Consumer 2
Consumer 1
Producer
Which statement concerning the energy in this
pyramid is correct?
A. Consumer 3 contains the greatest amount of
stored energy.
B. Stored energy decreases from Consumer 2 to
Consumer 3.
C. Stored energy increases from Producer to
Consumer 1.
D. Producer organisms contain the least amount of
stored energy
Answer:
B)stored energy decreases from consumer 2 to consumer 3
stored energy decreases from consumer 2 to consumer 3, concerning the energy in this pyramid is correct. thus option B is correct.
what are consumers in food chain ?In a food chain there are two types of organism present producer which are mainly green photosynthetic plants, consumers which are depend on producers.
the primary difference between the position of producers and position primary consumers in the food chain are Primary consumers consist of the second level of the food chain, while producers make up the third level of the food chain.
The producer can autotropic organism as they make their own food whereas consumers are heterotrophic organism as they depend on producers for their nutrition.
consumers are classified into primary, secondary, quaternary and tertiary consumers which are herbivore, carnivore and omnivore respectively in nature based on their nutrition.
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Explain to me what biology is.
The average lifespan a tortoise is 200years. How many scores is this?
*i don’t know what it means by scores but that’s the question i received*
Answer:
A score is 20.
So 200÷20=10.
You can find 10 scores in 200.
Answer:
Explanjtyj6isnhgoi eut
A population of Blue Jays originally lays between 1 and 10 eggs at a time. As the environment changes, more predators arrive, and eat the eggs. Mothers with only a few eggs lose all of them and do not reproduce successfully. At the same time, there is a scarcity of worms, and mothers that lay 10 eggs cannot feed all of them. After a few generations the majority of Blue Jays lays 4-6 eggs only. What type of selection has occurred?
A. Disruptive selection
B. Directional selection .
C. Artificial selection
D. Stabilizing selection
Answer:
D. Stabilizing selection
Explanation:
Stabilizing selection helps to prevent extreme trait characteristics and focuses on the non extreme ones to ensure that such traits are prevalent.
Due to the fact that there isn’t enough food for a large number of the offspring and also the risk of losing all the eggs to those who had a small amount of eggs, stability was achieved after some generations that ensures that there was a balance in ensuring the eggs weren’t too few and too many.
Bile:_______
A. digests proteins in the small intestine.
B. emulsifies fats in the small intestine.
C. is made by the gallbladder and stored by the liver.
D. activates trypsin in the small intestine.
E. activates the pancreas.
⚘ Emulsified fats in the small Intestine (B)
Explanation:-Bile is not an enzyme which is made in the liver which helps in the emulsification of fats. Here, Emulsification means the break down of larger molecules of fat into small molecule. The bile is temporarily stored in the Gall Bladder.
The bile juice is then released into the duodenum(the first part of small intestine) through hepato pancreatic duct. The duct carries both enzymes of pancreas and bile. They digest the food in the small intestine[tex].[/tex]
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Which of the following best describes what happens to an enzyme after it catalyzes a chemical reaction? (5 points)
High-altitude, high-velocity "rivers" of air are called
anticyclones
Jet streams
cyclones
Tornadoe
What is the difference between a food chain and a food web? A. A food chain shows multiple food webs that are interconnected. B. A food chain is used when there are no decomposers present, a food web includes them and shows the recycling of nutrients. C. A food web is only used when organisms that have multiple ways of getting energy are involved, such as Omnivores. D. A food web shows multiple food chains that are interconnected.
Answer:
D
Explanation:
what is the scientific study of living things.
Answer:
Biology is the scientific study of living things.
Explanation:
hope this will help :)
Explanation:
biology is natural science concern with study of life and living organisms .Modern biology is vast and eclectic field composed of many specialized disciplines that study the structure , function , growth, distribution , evolution ,or other features of living organisims...the cell is the basic unit of life.
Would you use an observational, experimental, or modeling approach to study a rare, endangered bird species
Answer:
The correct answer would be - observational approach.
Explanation:
Observation approach is the research technique that involves the observation of the subject or participates behavior in their natural habitat or state. This will be one of best approach to study.
Similarly when characterizing new findings various aspect of experimental, Observational details or modelling approaches will help in identification , classification and nomenclature. However, in comparison to experimental and modeling approach is more appropriate method for the rare endangered species.
Thus, the correct answer would be - observational approach.
Which domain(s) is/are made up of organisms without nuclei?
Answer:
Archaea
Explanation:
All of life can be divided into three domains, based on the type of cell of the organism: Bacteria: cells do not contain a nucleus. Archaea: cells do not contain a nucleus; they have a different cell wall from bacteria. Eukarya: cells do contain a nucleus.
Answer:
ARCHAEA is yr ANSWER..
Trees maintain the balance between gases in the air, removing carbon dioxide from the air and releasing oxygen. Please select the best answer from the choices provided T F
yes the trees maintain the balance between gases in the air
Photosynthesis absorbs and stores carbon dioxide in trees' wood. Trees and plants store carbon dioxide throughout their lives, slowing the gas's buildup in our atmosphere, which is quickly warming our world. Therefore, its true.
Why are trees important?By supplying oxygen, enhancing air quality, reducing climate change, conserving water, maintaining soil, and fostering animals, trees benefit their surroundings. Trees absorb carbon dioxide during photosynthesis and turn it into the oxygen we breathe.
By reducing the effects of the sun, rain, and wind, trees regulate climate. The radiant energy of the sun is absorbed and filtered by leaves, keeping things cool in the summer. By acting as a windbreak, trees also keep the heat in. They not only control wind direction and speed, but also protect us from precipitation such as hail, sleet, and rain. By maintaining low levels of carbon dioxide, trees also lower air temperatures and lessen the intensity of the greenhouse effect.
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The first genomic libraries were cloned in:__________.
a) plasmid
b) bacteria
c) human
d) plants
Answer:
A. Plasmid
Explanation:
The first genomic libraries were cloned in plasmid. Thus option A is correct.
What is genomic library ?
A library is constructed by using a collection of the total genomic DNA from a single organism.
Genomic library construction involves the isolation of genomic DNA from a target organism, purification of the genomic DNA followed by fragmentation by using restriction enzyme into desired size,
The cloning of the fragmented DNA using a desired vector. The vector are different depend on the insert size of DNA.
The most common vectors are Escherichia coli or yeast and using these vectors easy amplification and retrieval of specific clones can be done which can further be used for analysis.
Genomic libraries are majorly used in for whole genome sequencing applications including the human genome and several model organisms.
Thus option A is correct.
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Many chemotherapy drugs used to treat cancer work by modifying the mitotic spindle. Paclitaxel works by interfering with normal microtubule breakdown during cell division and Vinblastine works by binding tubulin, thereby inhibiting the assembly of microtubules. How and where specifically do you think these drugs would stop a cancer cell
Answer:
by inhibiting the mitotic spindle plasticity
Explanation:
In eukaryotic cells, the mitotic spindle is the cytoskeletal structure by which sister chromatids are separated during cell division. Spindle microtubules are known to drive chromosome segregation, while tubulins are Microtubule-Associated Proteins (MAPs) that attach to microtubules in order to modulate their dynamics. Antimitotic drugs are nowadays widely used in chemotherapy to disrupt microtubule assembly and chromosome segregation, thereby producing mitotic arrest and cell death (apoptosis).
Amphibians moved to a terrestrial environment; however, they did not evolve the ability to live their entire lives on land. Explain the reason that they are still dependent on an aquatic environment. g
Answer:
See the answer below
Explanation:
Amphibians are not totally adapted to live on land because the aquatic environment is needed for several life processes such as reproduction, respiration, and sometimes, feeding.
The eggs of amphibians are without any protective shells and will suffer desiccation in the terrestrial environment. Hence, water is needed in order to protect the eggs. In addition, the male amphibians shed their sperm in the water close to the female eggs.
The young ones of amphibians are essentially aquatic and may not survive out of water for a long time because they only breathe gills - the lung is yet to develop or poorly developed at this stage. They have to grow and develop to a certain stage in water before they can start surviving on land.
Due to their reliance on an aquatic habitat for reproduction, amphibians relocated to a terrestrial environment but did not evolve the capacity to spend their entire lives on land.
Amphibians often lay their eggs in water or other damp places since these conditions are essential for a proper embryonic development.
Since the eggs don't have a shell to protect them, they need a moist environment to prevent desiccation and promote gas exchange.
The frog is an illustration of an amphibian that is still reliant on an aquatic habitat. In water, frogs lay their eggs, which develop into aquatic tadpoles.
Thus, even though they can live and thrive on land for a substantial portion of their life cycle, amphibians are dependent on an aquatic environment due to their reproductive and metabolic traits.
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Your question seems incomplete, the probable complete question is:
Amphibians moved to a terrestrial environment; however, they did not evolve the ability to live their entire lives on land. Explain the reason that they are still dependent on an aquatic environment. give example.