Answer:
The correct answer is - 0.72 pg.
Explanation:
A we know that, genetic material present in one primary spermatocyte divides in between four sperm cells that means that each sperm cell has 25 percent of DNA or genetic material of the primary spermatocyte.
Given:
1 sperm cell = 0.18 nuclear DNA
So,[tex]DNA content of one sperm cell = \frac{\text DNA content of primary spermatocyte}{4}[/tex]
0.18*4 = DNA content of primary spermatocyte
DNA content of primary spermatocyte = 0.72 picogram
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.
Explain to me what biology is.
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.
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:
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.
Green pigmented plastids that function in photosynthesis are called
Answer:
Green pigmented plastids that function in photosynthesis are called Chloroplasts
How many ATP would ultimately be generated from the complete oxidation of an 18 carbon stearoyl-CoA?
Answer:
90 Atp
Explanation:
Stearyol co A is an enzyme that is responsible for fatty acid metabolism. This take place in the presence of oxygen.
Complete oxidation of stearyol co A break into 9 acetyl co A which through kreb cycle and electron transport chain produced 90 ATP.
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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1. Explain how applied heat works between and at critical temperatures.
2. Explain how a refrigerator works to cool down warm objects that would
otherwise be room temperature.
3. Fill in the chart below to identify the name of the process that explains the
state of change indicated, the states of matter being changed, or the points at
which the process occurs.
Changing from a
to a
is called
and happens at the
point.
solid
liquid
liquid
evaporation/boiling
evaporation/boiling
liquid
condensation
solid
freezing
Answer:
1) Gases become more difficult to liquefy as the temperature increases because the kinetic energies of the particles that make up the gas also increase. The critical temperature of a substance is the temperature at and above which vapor of the substance cannot be liquefied, no matter how much pressure is applied.
2)The compressor constricts the refrigerant vapor, raising its pressure, and pushes it into the coils on the outside of the refrigerator. When the hot gas in the coils meets the cooler air temperature of the kitchen, it becomes a liquid. The refrigerant absorbs the heat inside the fridge, cooling down the air.
Explanation:
hope this helps you.
Answer:
1. When a solid substance is heated, its temperature will rise until it reaches a critical temperature. At this point, the item won’t melt unless more heat is provided. This additional heat represents energy needed to change the state of the substance from solid to liquid. This energy loosens the ties of molecules, causing them to move faster. When enough heat energy is provided, the substance will change to the liquid state, but the temperature of the substance won’t change. The amount of heat energy required to change a unit of mass from a solid to a liquid without any change of temperature is the latent heat of fusion. If it’s necessary to increase the temperature of a melted substance, additional heat energy must be provided. The latent heat of vaporization is the amount of heat energy required to change a unit of mass of a liquid to a gas without a temperature change.
To condense a gas to a liquid, the gas must be cooled to the condensation point. After condensation, the liquid will have the same temperature as the gas; the temperature is still at the condensation point. To be cooled further, more heat energy should be released.
2. The liquid refrigerant in the indoor coils picks up heat from the indoor air and evaporates. In the gaseous state, it’s pumped to the outdoor coils, where it releases vaporization heat and condenses to the liquid state. The heat is transferred to the outdoor air, and the liquid refrigerant continues to circulate to the indoor coils to repeat the cooling cycle.
3.
Changing from a to a is called and happens at the _______ point.
solid liquid melting melting/fusion
liquid gas evaporation/boiling evaporation/boiling
gas liquid condensation condensation
liquid solid freezing freezing
Explanation:
PF
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:
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
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.
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).
Help pls
This illustration of the great ocean conveyor belt shows the movement of surface ocean currents around the globe. What is the effect of these currents on Earth's temperatures?
A) Weather patterns are more rainy in the south due to the cool currents.
B) There are constantly changing conditions at the equator as a result. C)Temperatures are more stable across the globe due to these cyclical currents. D) Global temperatures constantly decrease due to the movement of warm currents.
Answer:
C. Temperatures are more stable across the globe due to these cyclical currents.
It makes the most sense. If warm and cold water and constantly changing places, then it is likely that the water all around the world will be a constant/similar temperature.
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.
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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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.
High-altitude, high-velocity "rivers" of air are called
anticyclones
Jet streams
cyclones
Tornadoe
According to the Fujita Tornado Intensity Scale, a category F5 tornado,has what range of wind speeds?
a. 113–157 miles per hour
b. 261-318 miles per hour
c. 207-260 miles per hour
d. 40-72 miles per hour
Answer:
Hi! The answer is B.) 261 to 318 mph.
Explanation:
The Fujita scale classifies tornadoes according to the damage they cause. Almost half of all tornadoes fall into the F1 or “moderate damage” category. These tornadoes reach speeds of 73-112 mph and can overturn automobiles and mobile homes, rip off the roofs of houses, and uproot trees.
Only about one percent of tornadoes are classified as F5, causing “incredible damage”. With wind speeds in excess of 261 mph, these tornadoes are capable of lifting houses off their foundations and hurling them considerable distances.
Which of the following best describes what happens to an enzyme after it catalyzes a chemical reaction? (5 points)
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.
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.
Which of the following is not termed as hybridization? a) DNA & cDNA b) DNA & mRNA c) DNA from different species d) DNA from male & female of same species.
Answer:
DNA from male & female of same species
Explanation:
According to base-pairing rules, adenine (A) always bonds to thymine (T) or Uracil (U), while guanine (G) always bonds to cytosine (C). Nucleic acid hybridization is a process produced by base-pairing complementary between two different DNA (or DNA and RNA) single-stranded molecules to give a hybrid double helix. In consequence, and since hybridization involves base-pairing from different sources, the pairing between DNA strands belonging to male and female of the same species is not considered as a process of hybridization.
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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What’s is a private club
Answer:
The closest answer is;
An association of persons for the promotion of a common object
Explanation:
earth facts describe earth where how
Answer:
[tex] \boxed{ { \bold{ \sf{ \blue{See \: below}}}}}[/tex]Explanation:
▪️[tex] \underline{ \underline{ \huge{ \bold{ \orange{ \sf{Earth}}}}}}[/tex]The earth is only the planet in the solar system that is suitable for survival of living organisms including human civilization. The earth is about 4.55 billion years old. It is the third planet on the basis of distance from the sun and fifth largest planet in the solar system. The average surface temperature of the earth is 15º C. Earth consists of 71 % of water and 29% of land. It is 1.5 × 10⁸ km far from sun ( 1 AU ). It's rotation period is 24 hrs and revolution period is 365 days 6 hrs ( reasons for leap year ). It consist of one natural satellite called moon.
▪️[tex] \underline{ \underline{ \bold{ \orange{ \sf{Some \: facts \: about \: our \: Earth}}}}}[/tex]
⇒[tex] \sf{estimated \: age \: = 4.55 \: billion \: \: years}[/tex]
⇒[tex] \sf{mass = 6 \times {10}^{21} \: metric \: tons}[/tex]
⇒[tex] \sf{total \: surface \: area \: = 509,700,000 \: {km}^{2} }[/tex]
⇒[tex] \sf{land \: area \: = \: 148,400,000 \: {km}^{2} }[/tex]
⇒[tex] \sf{water \: area \: = 361,300,000 \: {km}^{2} }[/tex]
⇒[tex] \sf{highest \: land = 8848 \: m \: (mt \: . \: everest}[/tex]
⇒[tex] \sf{lowest \: point = 399 \: m \: (dead \: sea}[/tex]
⇒[tex] \sf{average \: density = 5.5 \: gm \: per \: {cm}^{3} }[/tex]
⇒[tex] \sf{number \: of \: satellite = 1(moon)}[/tex]
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why do muscles pull but not push
Explanation:
Muscles can pull bones, but they can't push them back to the original position. So they work in pairs of flexors and extensors. The flexor contracts to bend a limb at a joint. Then, when the movement is completed, the flexor relaxes and the extensor contracts to extend or straighten the limb at the same joint.
Answer:
the muscles are designed to only contract
Explanation:
the muscles would not be able to pull if the two protein molecules are not present.
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.
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: