What are the main principles of the theory of natural selection?

A. There are only three principles of the theory of natural selection - variation, overproduction, and adaptation.

B. Adaptation is the only principle of the theory of natural selection.

C. variation, overproduction, adaptation, and descent with modification

D. variation, reproduction, adaptation, and descent with modification

Answers

Answer 1
C. variation, overproduction, adaptation, and descent with modification
Answer 2
C. variation, overproduction, adaptation, and descent with modification.

Related Questions

The parents of a 2-year-old arrive at the hospital to visit their child. the child is in the play room and ignores the parents during the visit. the nurse tells the parents that this behavior in a 2-year-old child indicates which?

Answers

There is not any answer choices to choose from, so I'm assuming that behavior is commonly linked to depression or anxiety.

What would happen if a fresh water fish did not produce lots of watery urine

Answers

The answer is that the Water would move out of the fish by osmosis. If a fresh water fish did not produce lots of watery urine means that the content of the fish would be hypotonic to the outside environment, therefore water would move out of the fish through osmosis decreasing the amount of water inside the fish's body.

All animals can trace their lineage to a common ancestor that lived in the _____. see concept 32.2 (page 673)

Answers

The best answer is Neoproterozoic era. Neoproterozoic Era is the unit geologic time from 1000 to 541 million years ago. It is the last era of the Precambrian Supereon and the Proterozoic Eon; it is subdivided into the Tonian, Cryogenian, and Ediacaran Periods. It is preceded by the Mesoproterozoic  era and succeeded by the Paleozoic era.

Discuss one theory that has been proposed about the formation of the universe. Provide at least on piece of evidence to support this theory. The theory I chose was The Theory of Evolution.
Teacher comments: Your answer needs to focus on the formation of the universe, not biology.,

Answers

The theory that has been proposed about the formation of the universe is the big bang theory. It is the idea that this whole universe was once a single very dense point that exploded to form everything in the universe. The theory of evolution is something else, it is about the origins of humans and how the human specie evolved on earth over millions of years based on the belief that the starting point were monkeys.


At which latitude would the sun be directly overhead at noon on April 21?


8°N

8°S

23.5°N


Answers

Final answer:

On April 21, the sun would be directly overhead at the equator (0° latitude) as the sun is beginning to shift from the equator towards the northern hemisphere.

Explanation:

On April 21st, the sun is directly overhead at the equator, which is at 0° latitude. During the equinox, which occurs roughly around March 21st and September 21st, the sun's rays are perpendicular to the Earth's surface at the equator. By April 21, the sun is beginning to shift northward but has not reached its maximum declination of 23.5°N, which happens during the summer solstice in late June. Therefore, the sun is still overhead at the equator at this time.

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What fraction of this cross will be recessive for both traits?

Answers

3/5 of the cross will be ressesive

What is a virus envelope in biology?

Answers

The Virus Envelope is where the capsid is surrounded by lipid bilayer that contains viral proteins, usually including the proteins that would enable the virus to bind to the host cells. and is derived from the host cell membranes. They may help viruses avoid the host immune system. The viral envelope then fuses with the host's membrane, allowing the capsid and viral genome to enter and infect the host.

Which of the following statements about the nucleus is true?
A. The nucleus stores the coded instructions for making the cell’s proteins.
B. The nucleus usually contains a nucleolus region which is where mitochondria assembly begins.
C. The nucleus is the site of protein assembly.
D. The nucleus is surrounded by cell membrane that lets materials in and out.

Answers

The correct answer is D

Answer:

The correct answer is option A. The nucleus stores the coded instructions for making the cell’s proteins.

Explanation:

Hello!

Let's solve this!

The nucleus is the central part of the cell. It contains all the instructions for the cell to work. It also contains the DNA. Among its functions, is to store the instructions of the cell to be able to produce proteins. It is covered by a nuclear membrane.

After the analysis, we conclude that the correct answer is option A. The nucleus stores the coded instructions for making the cell’s proteins.

The oxygen which is released into the air by a plant originates from: the release from carbohydrate decomposition from co2 gas splitting of water molecules protein synthesis

Answers

The answer is splitting of water molecules. This happens during the light stage of photosynthesis where light energy from the sun is absorbed by chlorophyll is used to split water molecules into hydrogen ions and  oxygen. This process is called photolysis. The hydrogen ions joins the dark stage or the light independent stage, while oxygen gas is either released to the atmosphere or used for cellular respiration. 
Final answer:

The oxygen released into the air by plants originates from photosynthesis, where carbon dioxide and water are converted into glucose and oxygen using light energy.

Explanation:

Photosynthesis is the essential biological process by which green plants, algae, and some bacteria convert light energy, usually from the sun, into chemical energy in the form of glucose and oxygen. Chlorophyll, a green pigment in chloroplasts, captures light energy, and through a series of chemical reactions, carbon dioxide is converted into sugars, releasing oxygen as a byproduct. This process is fundamental to the Earth's ecosystem as it provides energy and oxygen for most life forms.

The oxygen released into the air by a plant originates from the process of photosynthesis. During photosynthesis, plants convert carbon dioxide and water into glucose (sugar) and oxygen using light energy. This oxygen is then released into the atmosphere.

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The thermosphere protects the Earth from UV radiation coming from the Sun. Please select the best answer from the choices provided T F

Answers

False, the ozone layer protects Earth from UV radiation.

Answer: False

Explanation:

The stratosphere is the layer of the atmosphere which shields the earth from the harmful incident rays like infrared and ultraviolet radiations. It consist of ozone layer near the altitude of 25 kilometers. The ozone molecules present in the stratosphere absorb the high energy UV rays which are capable of warming the inner atmospheric layers of the earth, may cause damage to the genetic material of the organisms and skin problems in humans.

On the basis of the above explanation, statement The thermosphere protects the Earth from UV radiation coming from the Sun is false.  

Compare the lymphatic system with the cardiovascular system

Answers

The circulatory system is the combination of the lymphatic system and the cardiovascular system. It comprises of the heart, blood vessels and blood as well as lymph, lymph nodes, and lymphatic vessels. It controls the whole transportation activity in the body.

Bottom trawling is considered destructive because _______.
a.
it destroys sea floor habitats
b.
it depletes fish populations
c.
it shatters deep-sea coral
d.
all of the above

Answers

Answer:

the answer is ALL OF THE ABOVE

Bottom trawling is considered destructive because it destroys seafloor habitats, depletes fish populations, and it shatters deep-sea coral. So, it's D i.e. all of the above.

What do you mean by Habitat?

Habitat may be defined as a type of natural environment for which a particular species is best adapted due to natural selection.

Bottom trawling is an activity of fishing practice that herds and grasps the target species by hauling a net along the seafloor.

This activity creates a disturbance along the seafloor which leads to the population depletion of fishes and destructs the deep-sea coral.

Therefore, the correct option for this question is D.

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What type of succession will follow if Jones High School was to be abandoned for 20 years due to a serious storm? state why?

Answers

Primary succession would occur. The buildings would slowly collapse, effectively meaning that plants would need to colonise bare concrete, with no previous life existing. On could envisage that seeds of some pioneer plants could germinate within cracks forming in the concrete. Some wild animals might take shelter in the degenerating structures, adding nutrients to the ground. Eventually, the walls of the structures would be mostly collapsed, and a layer of soil would cover most of the structure.  

Benjamin Franklin gathered scientific data to chart the Gulf Stream with his cousin, ship captain, Timothy Folger. Why was this important in the 1700s? (1 point)

Migratory birds could be monitored when using the currents.
Sailing ships could be redesigned to use the currents.
Ships could then take advantage of the currents to speed up travel.
Weather predictions could be made based on current speed and direction.

Answers

The scientific data that Benjamin Franklin gathers on the Gulf stream was important in the 1700's because ships could take advantage of the currents to speed up travel. Up to that time, they were unaware of how a ship traveling in one direction could reach their destination so much faster than a ship traveling in the opposite direction.

Answer:

c

Explanation:

Ships could then take advantage of the currents to speed up travel.

When cells are metabolically active but not dividing, they are in the ________ phase. when cells are metabolically active but not dividing, they are in the ________ phase. log exponential lag stationary death?

Answers

The answer is lag. The number of bacterial cells doubles at a constant, exponential rate during log phase, while growth rate and death rate are the same during stationary phase. The fourth phase is the death phase, when the rate of cell death is faster than the population growth. 
When cells are metabolically active but not dividing, they are in the lag phase. Lag phase is among the four phases. others being log phase or exponential phase, stationary phase and the death phase, of bacterial growth. During the lag phase there is very little to no bacterial growth, log phase or the exponential phase; the number of cells doubles at a constant rate, stationary phase; the population growth levels off as the rate of cell death equals the rate of cell division, and finally the death phase where the process of cell death is greater than the process of cell division.

After Frida stops exercising, she continues to breathe heavily. What is most likely occurring in her body? Heavy breathing during exercise has produced an oxygen surplus in her muscles. This oxygen is being transported to her lungs. This is a result of aerobic respiration. Heavy breathing during exercise has produced a carbon dioxide surplus in her muscles. Lactate is being transported to her liver. This is a result of aerobic respiration. Strenuous exercise has caused her body to be in carbon dioxide debt, and she is breathing hard while lactate is transported to the liver. This is a result of anaerobic respiration. Strenuous exercise has caused her body to be in oxygen debt, and she is breathing hard while lactate is transported to the liver. This is a result of anaerobic respiration.

Answers

anaerobic respiration

Final answer:

Frida's heavy breathing after exercise indicates her body is trying to pay off an 'oxygen debt' incurred by ATP production during vigorous muscle activity. This is possible due to anaerobic respiration wherein the body, demanding a high oxygen intake, continues with an escalated breathing rate post-exercise until the oxygen debt is repaid.

Explanation:

Following intense exercise, the heavy breathing that Frida continues to experience is a result of her body trying to repay an oxygen debt. Oxygen debt is created during intense muscle activity, where ATP - the primary source of energy for cellular reactions - is produced without oxygen during muscle contraction. This is due to a process called anaerobic respiration.

To restore ATP and creatine phosphate levels, convert lactic acid to pyruvic acid, and in the liver, to convert lactic acid into glucose or glycogen, a substantial amount of oxygen is required. These processes all contribute to the increased breathing rate even after exercise has stopped. The body continues to demand a high intake of oxygen until the oxygen debt is repaid.

Thus, the scenario described represents an instance of anaerobic respiration following a strenuous exercise that led Frida's body to fall into an oxygen debt, thereby causing a high breathing rate, with lactate being transported to the liver after the exercise completed.

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What is the dark, organic-rich material that develops when the decay of plant material is slowed by the of lack of oxygen under waterlogged conditions?

Answers

This is what is commonly know as 'peat'.  Peat is found in peatlands, bogs, mires and moors, and is an accumulation of partially decayed vegetation or organic matter. The decay is slowed down by a lack of oxygen due to waterlogged conditions. These areas are very important carbon sinks as the CO2 released by the decaying matter is trapped within the peat. It requires thousands of years for peatland to develop. Peatlands are very important as they provide a record of past vegetation and climate within the preserved plant remains.

In an experiment to study the effect of proteases on proteins, what is the MOST LIKELY effect of a major change in pH? A) increased rate of product formation B) a change in the substrate concentration C) the formation of new active sites of the enzyme D) a change in shape of the active sites of the enzyme

Answers

Answer: The correct answer is-

D) a change in shape of the active sites of the enzyme.

Enzymes are primarily protein molecules that drive various chemical reactions ( by increasing the rate of reaction) within the body of living organisms.

Protease is a protein digesting enzyme that works on specific pH ( such as pepsin works on pH 2 within stomach, which is highly acidic) .

Shape of an enzyme determine its function as they have active sites ( which have unique shapes) that fit in the substrate and carry out the chemical reactions.

A major change in pH can alter the shape of the active sites of the enzyme, making it inactive.

Thus, option D) is the right answer.

Final answer:

A major change in pH is most likely to result in a change in shape of the active sites of the enzyme (D), as enzymes have an optimal pH range and changes can affect their tertiary structure and catalytic activity.

Explanation:

In an experiment to study the effect of proteases on proteins, the most likely effect of a major change in pH is a change in shape of the active sites of the enzyme (D). Enzymes, which are proteins, have an optimal pH range in which they operate most effectively. Deviating from this optimal pH range affects the ionization of acidic and basic side groups, particularly those in the active site, altering the enzyme's tertiary structure and consequently its ability to bind to the substrate. This modification in structure can drastically reduce the enzyme's catalytic activity.

The waves that have shorter wavelengths than visible light are: (check all that apply)

Question 14 options:

Radio stations


Ultraviolet waves


Gamma rays


Mircowaves

Answers

The answers are Gamma rays and Ultraviolet  waves. Light waves with shorter wavelengths and higher frequencies also have more energy, so types of light like gamma rays, X-rays, and ultraviolet light are more energetic than visible light, and infrared , microwaves, and radio waves are less energetic than the light in the visible spectrum.

Final answer:

Among the given options, ultraviolet waves and gamma rays have shorter wavelengths than visible light; thus, they are the correct choices. Radio stations and microwaves have longer wavelengths.

Explanation:

The waves that have shorter wavelengths than visible light are ultraviolet waves and gamma rays.

The electromagnetic spectrum is the range of all types of electromagnetic radiation, which includes gamma rays, X-rays, ultraviolet rays, visible light, infrared radiation, microwaves, and radio waves. Of the options provided, ultraviolet waves and gamma rays have shorter wavelengths than visible light. Gamma rays have the smallest wavelengths but the highest frequencies and energies, while ultraviolet rays also have wavelengths shorter than visible light but are less energetic than gamma rays.

Radio stations and microwaves have longer wavelengths than visible light. Radio waves, in particular, have the largest wavelengths and the lowest frequencies and energies, while microwaves have shorter wavelengths than radio waves but still longer than visible light.

in the northern hemisphere, a wind blowning from the south to the north will cause a current of water in which direction

Answers

Hello,

Here is your answer:

The proper answer to this question is "east".

Here is how:

When the wind blows from the south to the north the current of water will go to the east because of the direction of the air is blowing.

Your answer is east.

If you need anymore help feel free to ask me!

Hope this helps!

Identify the region of the humerus that articulates with the ulna. head capitulum medial epicondyle trochlea

Answers

The correct answer is the trochlea. The trochlea is a protuberation on the distal humerous that attaches on the trochlear notch of the ulna. The trochlear notch is formed on the proximal head of the ulna; the attachment of the trochlea of the humerus to the trochlear notch forms a hinge joint.


The quality or condition of being intense

Answers

intensity would be the answer

Answer: it is Intensity.

Explanation:

Intensity is the quality or condition of being intensed especially extreme state of of strength,force or energy. It also means severity or magnitude of a something and the effects it has.

Select the reasons why the term 'prokaryote' can be problematic.
It implies that prokaryotes existed before eukaryotes.
It implies that eukaryotes evolved from prokaryotes.
Prokaryote and eukaryote are used as a result of an evolutionary worldview.




Select effects of bacteria on the world around us.
food spoilage
flavor food
make cheese
make yogurt
causes Measles
decomposition

Answers

1. Answer:
It implies that prokaryotes existed before eukaryotes.
It implies that eukaryotes evolved from prokaryotes.
Prokaryote and eukaryote are used as a result of an evolutionary worldview.

All of the three sentences is true. The word "pro-" from prokaryotes means "before". So, prokaryotes sound like an organism that exists before eukaryotes. If you link it with evolution, you can assume that eukaryotes were prokaryotes that evolved.

2. Answer:
food spoilage
flavor food
make cheese
make yogurt
decomposition

Measles can be excluded easily because it was caused by virus, not bacteria. Food spoilage is caused by bacteria. That is why food preservation method would result in killing/inhibiting bacteria. Decomposition is similar to spoilage. Bacteria also used for fermentation in cheese, yogurt or beer.

The tiny plates (holes) of bone material found in spongy bone are called

Answers

The tiny holes/plates found in spongy bone are known as trabeculae.

VO2max is

A. a test used to help people lose unwanted weight.
B. the highest level of oxygen consumption that can be sustained during exercise.
C. a measurement of how much blood the heart pumps during exercise.
D. not a good test of cardiorespiratory fitness.

Answers

VO2max is the highest level of oxygen consumption that can be sustained during exercise.

Help?

Explain the influence that Darwin's idea of natural selection had on the modern theory of evolution.

Answers

Well, once, people thought that evolution had a goal, and was not random. That belief was called goal oriented evolution. Darwin's theory of natural selection stated that evolution happened because of how species adapt to their environment. If they cannot adapt, they'll die, which leaves those who can adapt. So now thanks to him, our idea of how the natural world came to be today is much more developed.

The smooth-grained version of granite is the rock ___________.

Answers

Hello there!

The smooth-grained version of granite is the rock rhyolite. This would be the kind of rock that would be practically smooth, and it would be a version of a granite rock. They would be an illustration of the rock below.

I hope this helps you!
Hi there!

The smooth-grained version of granite is the rock rhyolite. 

Hope this helps!

Permitting the exchange of nutrients and gases between blood and tissue cells is the primary function of _____. question 4 options:

Answers

This describes the function of the capillaries. Capillaries are the smallest of the body's blood vessels. They are one cell thick, and are the sites of the transfer of oxygen and other nutrients from the bloodstream to other tissues in the body. Additionally they collect carbon dioxide, waste materials and fluids for return to the veins. They connect the tiny muscular branches of arteries called arterioles, with tiny veins called venules. 

The number of individual organisms born into a population in a given year

Answers

That's called a birthrate. The number of individual organisms born into a population in a given year.
it is called the birth rate

You are on a call of a minor vehicle accident. your patient is a 22-year-old male who was the driver of a moderate t-bone collision. the patient was not wearing a seat belt and there was spidering of the windshield. the patient complains of neck pain and has a scalp laceration. after performing the primary assessment, you take vital signs and bandage the patient's scalp. when you tell him you need to backboard him, he refuses care and ambulance transport. because the person is alert and oriented to time, place, and person, you have the patient sign the separate patient refusal form provided by your service. how should you document this incident in your ems report?

Answers

one should document everything as to include all patient​ care, all of your exertions to convince the patient to be accompanied in an ambulance, and who are the witnesses in the patient's refusal. A signed waiver could also be of help so that it is a proof that the patient refused the treatment.

Document the EMS incident by recording the primary assessment, vital signs, care given, and the patient's refusal of further care and transport. Include any patient dialogue, level of consciousness, signing of refusal form, personnel details, and the nature and specifics of the incident objectively.

When documenting an incident in your EMS report, where a patient has refused care and ambulance transport, it is important to include a detailed and objective description of the scene and patient's condition. In this case, you would first note the primary assessment indicating the patient's complaints of neck pain and the presence of a scalp laceration. You should document the vital signs taken and that a bandage was applied. If the patient is alert and oriented, and refuses care after being informed of the risks, this should be carefully noted along with the signing of the patient refusal form. All dialogue with the patient, their level of consciousness, and understanding of the refusal of care should be thoroughly recorded. It is also necessary to include names and ID numbers of the EMS personnel present, the nature of the incident, and the time the call was received and attended to. Describe the incident factually, mentioning specifics such as the 'spidering of the windshield', the patient being unbelted during the collision, and any other relevant details. Include any reasons the patient provided for refusing care, ensuring that the report remains objective and professional.

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