Severe flooding in an area caused a population of minnows to become split into two separate ponds. Prior to the separation, the male minnows all had a moderate number of spots.

Following the separation, the first pond was filled with larger fish that fed on minnows, so male minnows with fewer spots were better able to avoid detection by predators. The minnows in the second pond, however, had very few predators, and female minnows in this pond preferred to mate with males that had the most spots.

After many generations, the two minnow populations evolved into different species and could no longer interbreed.

Fish Species Average # of Spots
Original Species four to six
New Species 1 zero to two
New Species 2 eight to ten


Which of the following best describes why the two minnow populations evolved into separate species?
A.
Natural selection acted upon the traits of the minnows in the first pond only, causing these fish to evolve into a new species with new adaptations.
B.
Natural selection acted upon the traits of the minnows in the second pond only, causing these fish to evolve into a new species with new adaptations.
C.
The same selective pressures were acting upon both populations, leading to a decrease in genetic variation and the formation of two new species.
D.
Different selective pressures were acting upon the two populations, leading to an increase in genetic variation and the formation of two new species.

Answers

Answer 1
The answer is D i’m pretty sure we did natural selection last unit!

Related Questions

What do plantations or farms help people to live?

Answers

Answer:

Plantations and farms provide food for people so there won't be starvation

Bellwork: of the locations of earthquakes over the past 10 years were plotted on a world map, which of the following would be observed?
A. Earthquakes occur with the same frequency everywhere on Earth.
B. Earthquakes generally occur along the edges of tectonic plates.
C. Earthquakes most frequently occur near the middle of continents.
D. Earthquakes do not seem to occur in any consistent pattern.​

Answers

Answer: B.

Explanation:

It's not A, because earthquakes happen at different magnitudes depending on how the plates shift beneath them.

It's not C, because tectonic plates are scattered among the earth.

It's not D, since the pattern of earthquakes are dependent on the shifts of tectonic plates.

It's B because tectonic plates are the reason earthquakes happen. Everytime they shift or move, an earthquake occurs. There may be some earthquakes that are not near tectonic plates but the majority are, which is why the question uses the word "generally occur."

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What is being reduced in the process of alcoholic fermentation in yeast?.

Answers

Answer:

In alcoholic fermentation, the electron acceptor called NAD + is reduced to form NADH. The exchange of electrons that occurs in the process helps to build ATP.

explain each of the following diffusion happens faster when the temperature rises

Answers

Answer:

Diffusion is the transport of particles from an area of high concentration to an area of low concentration.

Explanation:

So, with that being said, the higher the temperature is, the more Kinetic Energy the particles will have, meaning they will move to different areas of concentration at a faster rate.

Is a 2 week blizzard a long term event? Is a flood from a hurricane a short term event?

Answers

Answer:

A blizzard can be a 2 week and intense snowstorm with very strong winds. Generally, blizzards form when cold polar air meets warm, moist air from lower latitudes, So yes a blizzard of 2 weeks can be considered long term event

Floods can occur within minutes or over a long period, and may last days, weeks, or longer.

Explanation :

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A global examination of the diversity of tunicates, a marine animal that is related to other chordates, is shown in the graph here. The equator displays the greatest number of species of tunicates while the polar regions have fewer. Which statement explains the distribution of tunicates shown in the graph? es​

Answers

Answer: A) Tropical regions have more available niches into which new species can occupy.

Explanation: USATestPrep

Answer:

A) Tropical Regions have more available niches into which new species ca occupy.

Explanation:

Which of the following does water pollution affect: surface water, ground Water, or ocean water?

Answers

Answer:

Pollution affects surface water, groundwater, and ocean water

Explanation:

Pollution of surface water can cause degradation of ground-water quality and conversely pollution of ground water can degrade surface water. Thus, effective land and water management requires a clear understanding of the linkages between ground water and surface water as it applies to any given hydrologic setting.

spring tides happen 2 times each month at the ___ and __ phases.
neap tides happen 2 times each month at the ___ and __phases.


answers?

Answers

Spring tides happen 2 times each month at the new and full moon phases.Neap tides happen 2 times each month at the first and third quarter moon phases.

What is a Tide?

This is defined as the alternate rising and falling of the sea, usually twice in each lunar day at a particular place, due to the attraction of the moon

and sun.

The Spring tides occur during new and full moon phases while the Neap tides occur during the first and third quarter moon phases.

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1.Which of the following allows the EPA to regulate water on board aircraft to ensure that the public is not exposed to high levels of bacteria? a)Federal Aviation Administration b)clean water act c)food and drug administration d)safe drinking water act

2.which of the following specifically regulates discharges of pollutants into U.S. waters and regulates the quality standards for surface waters? A)clean water act b)safe drinking water Act c)Environmental protection agency d)national environmental policy act

Answers

Answer:

Safe Drinking Water Act.

Explanation:

1. The following allows the EPA to regulate water on board aircraft to ensure that the public is not exposed to high levels of bacteria is safe drinking water act and 2. clean water act.

What is the work of clean water act?

Under the CWA, the phrase “discharge of a pollutant” is described as “any addition of any pollutant to navigable waters from any factor source,” and “any addition of any pollutant to the waters of the contiguous area or the sea from any factor source.” In different words, a discharge of a pollutant takes place whilst a pollutant is discharged.

The Clean Water Act (CWA) establishes the fundamental shape for regulating discharges of pollution into the waters of the USA and regulating high-satisfactory requirements for floor waters.The US Environmental Protection Agency (EPA) Safe Drinking Water Act (SDWA) is a federal rules that hooked up the fundamental shape for the oversight of the requirements and high-satisfactory of consuming water.

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During mitosis, the X shaped figures that can be seen in prophase, anaphase and metaphase are called_______.

Answers

Answer:

chromosomes probably....... because X shaped ( are usually condensed form of chromatin) which divide .

Human muscle cells can continue to make ATP even if the cells are depleted of oxygen. Muscle cells may use an anaerobic process called .

A.photosynthesis

B.cellular respiration

C.alcoholic fermentation

D.lactic acid fermentation

Answers

D - Lactic Acid Fermentation

Which change in dna will cause a heritable germline mutation.

Answers

The answer will be :

Paternal exposure to high level of radioactive

it causes heritable germline minisatellite mutation.

Will give brainliest!!!!!! pls explain the student decides that measuring the amount of co2 produced will determine the total rate of both aerobic and anaerobic respiration. explain why she is correct. explain how the student could measure only the rate of anaerobic respiration.

Answers

The student could measure only the rate of anaerobic respiration by measuring the carbondioxide gas concentration.

How to measure the rate of anaerobic respiration?

In the absence of oxygen, yeasts convert glucose into ethanol and carbon dioxide. This rate of carbon dioxide is used to measure of the overall rate of anaerobic respiration.

So we can conclude that the student could measure only the rate of anaerobic respiration by measuring the carbondioxide gas concentration.

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How did richard neumann and vincenzo beltrone feel about the us government action during wartime?

Answers

Richard Neumann and Vincenzo Beltrone delay bad about the government during wartime as their freedoms weren't enjoyed.

What is freedom?

It should be noted that freedom simply means the rights that are accorded to an individual

During this period, there were four essential freedoms which are:

Freedom of speech and expression.Freedom of every person to worship God his way.Freedom from want.Freedom from fear.

During wartime, the fear was in the heart of millions of people. This was illustrated by both men.

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In a marine food web the total biomass of algae far outweighs the total biomass of all the killer whales. Why?​

Answers

Answer:

because there is more potential food energy in the algae but not in the killer whales because nothing eats the killer whales

Because there is a greater potential for food energy in the algae than there is in the killer whales, who have no natural predators because nothing consumes them.

What is biomass?

The biomass of an ecosystem is what determines its structure. The energy contained in living creatures is referred to as their biomass. Autotrophs are the producers in a food chain and are responsible for converting the energy from the sun into biomass. Each successive trophic level results in a loss of biomass. Lower trophic levels almost always contain a greater quantity of biomass than higher ones do.

In the vast majority of ecosystems, the producer level contains both the highest energy level and the greatest amount of biomass. Because of this, there is a greater potential for food energy in the algae than there is in the killer whales. This is also due to the fact that the killer whales do not have any natural predators.

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1. What energy transformation occurs as biomass decays in a
compost bin:_________to__________
energy

Answers

The energy transformation that occurs as biomass decays in a compost bin is chemical energy to thermal energy.

What is energy?

Energy can be defined as an ability of a physical object (body) to do work. Thus, energy must be possessed or transferred to a physical object (body) before it can be used in doing a work.

The forms of energy.

In Science, there are different forms of energy and these include the following;

Gravitational energyElectrical energySound energyChemical energyThermal energy

In conclusion, the energy transformations that occur when biomass decays in a compost bin is chemical energy to thermal energy.

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What are amino acids used for? ASAP

Answers

Answer:

Break down food, grow, repair body tissue

Explanation:

Which of the following would be considered a biotic factor in an ecosystem?
water
flower
fog
soil

Answers

Flower
Biotic is referring to living things. Water, fog, and soil are referred to as abiotic because they are not living

Answer:

flower

Explanation:

biotic is a living organism including plants of any type fog spil and water are not living

State two features which are only found in dicotyledonous plant

Answers

Hey :)
Tap root system
Presence of two cotylendos
Leaves are dorsiventral

The end of the muscle that is attached to a bone or other structure that will move during contraction is called the ____________ .

Answers

Answer:

Tendon

Explanation:

Many mammals whose diet includes a great deal of leafy plant matter have extra compartments or extensions of their digestive tract that are not present in similar mammals that do not eat leaves. The function of the extra compartments is to Group of answer choices A. Increase surface area for absorption of nutrients into the blood B. Provide an area for their symbiotic bacteria to live C. Provide an area to store the leafy matter before digestion D. Provide an area to store water required for digestion

Answers

The function of the extra compartments in the stomach of ruminant animals is to provide an area for their symbiotic bacteria to live.

Ruminant's digestion

In order to be able to digest cellulose which is the principal component of grasses, plant-eating mammals, otherwise known as ruminants, have extra stomach compartments.

These stomach compartments exist to make the digestion of cellulose easier through a symbiotic relationship with cellulose-digesting bacteria.

The compartments house these symbiotic bacteria and partially chewed plants are stored in them to facilitate digestion.

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Which portion of a neuron contains all of the organelles?.

Answers

Answer:

dendritic processes and spines

Explanation:

Which of the following statements about the use of antibiotics is NOT true?
Bacteria become resistant to the antibiotics.
O
In the past, they were often prescribed for viral infections which increased the chance
of resistance in the patient.
O Can lead to harmful effects such as becoming addicted to antibiotic treatments.
Antibiotics used in farm animals can travel up the chain increasing the chance of
resistance in consumers.

Answers

the second option I m not to sure

What happens when the trade winds from South America break down?

Answers

Answer:

As a result of the reduced trade winds, warmer water from the western Pacific surges eastward, flattening the sea level. The thermocline in the eastern Pacific sinks as a result of the accumulation of warm surface water.

Explanation:

HELP ME ASAP!!!

what is some outliers for putting cabbage water, baking soda, and vinegar experinment?

Answers

Adding baking soda to the cabbage juice makes it a neutral base. When you add liquids to the cabbage juice, very acidic solutions will turn it a red color; neutral liquids make a purplish color; and basic solutions will make cabbage juice a greenish-yellow.

I chose this idea beause i will learn all about the acid and bases of this experiment.


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The amount of glucose in the bloodstream is increased by the hormone.

Answers

Answer:

Glucagon, a peptide hormone secreted by the pancreas, raises blood glucose levels.

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Awnser the science problem

Answers

Answer:

okay

Explanation:

1. When different forces have the same magnitude but go in oppisate direction

2.oppisate direction

3. speed and time

Please answer asap for chance of brainiest! How would you expect the rate of meat digestion to differ in an animal whose digestive tract had less of the enzyme pepsin?

Answers

Answer:

The four basic types of digestive systems in animals are monogastric, avian, ruminant, and pseudo-ruminant. Monogastric animals, such as swine, eat rations high in concentrates. The avian digestive system, found in poultry, is completely different from the other three types of digestive systems.

Explanation:

The four basic types of digestive systems in animals are monogastric, avian, ruminant, and pseudo-ruminant. Monogastric animals, such as swine, eat rations high in concentrates. The avian digestive system, found in poultry, is completely different from the other three types of digestive systems.

Carnivores or meat eater, digestive system of them  is very short because meat is very easy to digest, hence the level of acid in the stomach is high while the digestive system of herbivores are long so their digestion is slow and the level of acid in the stomach is high.

Who are Carnivores and Herbivores?

A carnivore is an organism that eats meat, or the flesh of animals. Sometimes they are also called hunters while some prey are called prey. Carnivores are a major part of the food web.

A herbivore is an organism which feeds on plants, ranges from in small size tiny insects such as aphids to large, lumbering elephants to large animals like cow, buffalo . Herbivores are a major part of the food web.

Herbivores eat only plant or plant products like sheep, cow, goat, etc. Carnivores are those who can eat animals only, for example lions, tigers, etc.

Thus, Carnivores or meat eater, digestive system of them  is very short because meat is very easy to digest, hence the level of acid in the stomach is high while the digestive system of herbivores are long so their digestion is slow and the level of acid in the stomach is high.

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What is the difference between gradualism and punctuated equilibrium?.

Answers

Answer:

The gradualism model depicts evolution as a slow steady process in which organisms change and develop slowly over time. In contrast, the punctuated equilibrium model depicts evolution as long periods of no evolutionary change followed by rapid periods of change.

Explanation:

Answer:

The gradualism model depicts evolution as a slow steady process in which organisms change and develop slowly over time. In contrast, the punctuated equilibrium model depicts evolution as long periods of no evolutionary change followed by rapid periods of change.

Explanation:

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Your roommate has been prescribed an antibiotic for bacterial pneumonia. She is feeling better and stops taking her antibiotic before finishing the prescribed dose, telling you that she will save the remainder to take the next time she becomes sick. What can you tell your roommate to convince her that this is not a good plan?

Answers

Answer:

the infection may feel like its going away but its still there and even though you feel better you still shouldnt save it bc those antibiotics were meant for  bacterial pneumonia

Explanation:

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