Consider the following scenario: A drought hits the habitat of a semi-aquatic bird population. All ponds dry up, and fish populations decline. There are two groups of birds in the population that differ in leg length and diet. Long-legged birds eat fish, while short-legged birds eat insects. The drought has little effect on insect populations. What is the main selective pressure in this scenario?
leg length

insect population

drought

fish population

Answers

Answer 1

fish population

cuz i know :0

Answer 2

The main selective pressure in the given scenario will be on the fish population. Thus, the correct option will be D.

What is Selective pressure?

The selective pressure can be defined as an evolutionary force that causes a particular phenotype to be more favorable in certain environmental conditions than other phenotypes. Selective pressures are the considered forces which can drive the evolution through the process of natural selection. Some phenotypes are more favorable than other phenotypes, depending on the external conditions.

Selective pressures can be detrimental or beneficial to certain phenotypes present within a population. The four main types of selection pressures are the biological factors, such as the predation and disease, the availability of resources, the climatic conditions, and the competition between different species.

Therefore, the correct option will be D.

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Related Questions

Which of the following are sites where waste products are released from the body but not where they are produced
O skin and anus
O large intestine and small intestine
O liver and kidney
O tubules and ureters

Answers

Answer:

Its A skin and anus

(just did test)

Explanation:

The skin and the Anus are sites where waste products are released from the body but not where they are produced.

Which process of the human body eliminates the waste products?

Excretion is the biological process through which any unwanted or waste products are eliminated from the body.

Large and small intestines produce waste products that are not completely digested by the stomach. The liver and kidney are also the sites of waste products like the removal of carbon dioxide and synthesis of urine respectively.

Therefore, the skin and the Anus are sites where waste products are released from the body but not where they are produced.

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Which of the following describes positive feedback?

Select one:

A. A loss of output from the body’s receptors.

B. The response of the body to increased temperatures.

C. An event that reduces the effects of a stimulus.

D. An event that enhances the original stimulus.

Answers

B if I’m correct in not C is my second choice

The living organism found within an ecosystem

Answers

Answer:

The living organisms in an ecosystem can be divided into three categories: producers, consumers and decomposers. They are all important parts of an ecosystem. Producers are the green plants The third type of living organism in an ecosystem is the decomposers.

Explanation:

no

HELP I'LL GIVE BRAINLIEST DUE BY 11:59!!!!!!!

I FELL BEHIND AND I NEED TO GET THIS DONE!!!!!!
ACCESS 2021 AP BIOLOGY

Answers

Enzyme activity can be affected by a variety of factors, such as temperature, pH, and concentration. ... However, extreme high temperatures can cause an enzyme to lose its shape (denature) and stop working. pH: Each enzyme has an optimum pH range. Changing the pH outside of this range will slow enzyme activity. Hope it helps

Plants, monera, and animals are all A.Have cell walls B. In the same kingdom C. In different kingdoms D. Have chloroplast

Answers

A i think would be the best choice

What environmental factor in the soil affects the coloration of a hydrangea plant?

Answers

carbon dioxide and water

Which one is the true answer

Answers

Answer:

mantle core crust

Explanation:

reproductive process of amoeba​

Answers

Reproductive process of amoeba

PLEASE HELP! 20 POINTS!! Explain how genes relate to the presence of dominant and recessive traits

Answers

Answer:

Fires often remove alien plants that compete with native species for nutrients and space, and remove undergrowth, which allows sunlight to reach the forest floor, thereby supporting the growth of native species. ... Overall, fire is a catalyst for promoting biological diversity and healthy ecosystems.

Explanation:

Table 1. Representative Animals and their Organs of the Digestive System
Selected Organ/s
Description/s
of the Digestive
System
Organisms
Name of
Representati
amoeba
1.
1.
2.
2.
planaria
1.
2.
1.
2.​

Answers

Answer:

zucydrwesrdfdshwhra avdtc

Explain ONE possibe advantage of vivipary when compared to
ovipary​

Answers

Embryos are protected and physiologically maintained by the pregnant female.

A scientific _______ is an explanation based on many observations by many different researchers.

A scientific _______ is usually an explanation based on one observation by one researcher.
A.
theory; hypothesis
B.
deduction; inference
C.
hypothesis; theory
D.
inference; deduction

Answers

Answer:

A

Theory

Hypothesis

I hope this helps

Which of the following data would support the claim that the gravitational force
between objects depends on mass?
O An object's weight can change depending where it is on Earth.
O A rocket can escape Earth's gravity by traveling at high speed.
O The further a planet is away from the sun, the smaller the gravitational force.
O Gravitational force is stronger on more massive planets.

Answers

Answer:

D.

Explanation:

gravitational force of attraction is stronger on more massive planets such as Jupiter

Gravitational force is stronger on more massive planets, the claim that the gravitational force between objects depends on mass, hence option D is correct.

What is gravitational force?

The force that pulls things toward the center of a planet or other body is called gravity. All the planets are kept in orbit around the solar by gravity.

Earth is subject to the same gravity pull that you are. But your force doesn't really affect our globe because Earth is so much larger than you are.

In our world, gravity the moon is maintained in its circle around Earth by gravity, as are the planets in their orbits around the sun. The gravitational force is equivalent to your weight when you are at rest on or near the Earth's surface.

Therefore, gravitational force is stronger on more massive planets, hence option D is correct.

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After the removal of the sea stars,


the number of species in the ecosystem was reduced.

the ecosystem became more diverse.

food webs in the ecosystem became more complex.

the size of the ecosystem was reduced.

Answers

I believe the food web in the ecosystem became more complex.

PLEASE HELP ME!!

A dam is built across a river to generate electricity. What is likely effect of the construction of a dam on the river?

a)increase in the size of fish in the river
b)increase in the water flow in the river
c)decrease in the population of aquatic organisms in the river
d)decrease in the amount of pollutants dumped into the river

Answers

Answer:

c i think

Explanation:

Most likely the effect of the construction of a dam on the river is that it decreases the population of aquatic organisms in the river. Thus, the correct option is C.

What is Population?

A Population may be defined as the group of individuals significantly belonging to the same species living in the same area in a definite time period.

When a dam is built across a river in order to generate electricity, it results in the reduction of the population of aquatic organisms in the river.

This is because the whole construction affects the natural habitat of aquatic organisms as well as their adaptations. So, such populations are frightened due to external construction and do not play their essential roles.

Therefore, most likely the effect of the construction of a dam on the river is that it decreases the population of aquatic organisms in the river. Thus, the correct option is C.

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DNA Unit Test (Spring 2021) / 19 of 29
What is most likely to result when a mutation affects a DNA sequence?
A. The codons will be unable to create bonds with the enzymes.
B. The nucleic acids will be unable to create bonds with the ribosomes.
C. The amino acid sequence will be changed and a different protein will be formed.
D. The protein sequence will be changed and a different set of nucleic acids will be formed.

Answers

Answer:it’s A

Explanation:

If there is no external force on a moving object it will

Answers

If there are no external forces acting on a moving object, it will move at a constant speed in a straightline. It states that acceleration is directly proportional to net force, and that acceleration is inversely proportional to mass.

Sophie visited Carlsbad Caverns with her family during her summer vacation, and she was amazed at the cave’s formations. She learned that the cave was formed from minerals.

Rearrange the phrases describing one of the ways minerals form into the correct order. Place the earliest stage of mineral formation at the top. Place the final stage at the bottom. (Write 1 2 3 or 4 in order)
1. a solution forms from a liquid and dissolved substances
2. a warm solution flows through a crack in the rocks there
3. elements and compounds leave as the solution cools
4. elements and compounds crystallize
BASICALLY SAY WHICH STEPS GO FIRST IN MINERAL FORMATIONS! PLESSS

Answers

Answer:

The ways through which the minerals form include the following order:

2. a warm solution flows through a crack in the rocks there

1. a solution forms from a liquid and dissolved substances

3. elements and compounds leave as the solution cools

4. elements and compounds crystallize

Explanation:

From the explanations above, it could be seen that a warm solution (most probably water) flows through the cracks in the rocks leading to dissolution of substances to form liquid. When the liquid cools, the elements leaves and crystallize as compounds.

Which statement accurately describes calories and Calories? A kilocalorie is equal to 1000 Calories. A kilocalorie is equal to 1000 Calories. A Calorie is equal to 100 calories. A Calorie is equal to 100 calories. A calorie is equal to 1000 Calories. A calorie is equal to 1000 Calories. A Calorie is equal to a kilocalorie. A Calorie is equal to a kilocalories.

Answers

Answer:

A kilocalorie is equal to 1000 Calories.

Explanation:

This is because 1000 calories make kilocalorie and it is the unit of energy in nutrition. It is the energy needed to raise temperature of 1 litre water to one centrigade or Celsius at sea level or is the amount of energy needed to cause increase of one degree Celsius of water.

What might happen to a desert biome if the area received more rain than it normally receives over an extended period of time? Describe some of the changes that you might expect to see

Answers

Answer:

Desert biome will change.

Explanation:

Desert biome will change if the area received more rain than normal it receives over an long period of time because the vegetation on that area appears. The change in rainfall pattern in the desert area changes the animals present in this region because the temperature of the desert is no longer suitable for the desert animals so they migrated and other organisms come to this place.

help me pleaseeeeeeeeeeeeeeeeeeeee​

Answers

Answer:

a

Explanation:

Paleontology is the study of the history of life on Earth as based on fossils. Fossils are the remains of plants, animals, fungi, bacteria, and single-celled living things that have been replaced by rock material or impressions of organisms preserved in rock.]

identify the type of solution (Hypotonic, Isotonic and Hypertonic) in each of the beakers. Write your answers as A=..., B=..., C=...

Answers

Answer:

Beaker A= Isotonic

Beaker B = Hypotonic

Beaker C= Hypertonic

Explanation:

ISO means the same on each side.

Hypo means less.

Hyper means more.

Beaker A= Isotonic

Beaker B = Hypotonic

Beaker C= Hypertonic

what is the difference between Isotonic Hypotonic Hypertonic?

Isotonic: Isotonic solutions are solutions having equal osmotic pressures.Hypotonic: Hypotonic solutions are solutions having lower osmotic pressures.Hypertonic: Hypertonic solutions are solutions having comparatively higher osmotic pressures.

The main difference between isotonic hypotonic and hypertonic solutions is that isotonic solutions are solutions having equal osmotic pressures while hypotonic solutions are solutions having lower osmotic pressure and hypertonic solutions are solutions with high osmotic pressure.

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This Is for today help!!

Answers

First one passive. Second one active. Third active. Fourth is active. Fifth active. 6 is active. Just remember if it is against concentration gradient or requires any kind of energy or ATP it is active.
I don’t know just need to answer a few questions

The starfish's water-vascular system is used for locomotion and capturing food. True/False

Answers

Answer:

true

Explanation:

Mitchell's family has the unusual trait of having an extra finger. Many members of his family were with an extra finger, which is a recessive trait. a family dinner, Mitchell's grandmother helped him sketch a pedigree of the family. Dark-shaded family members were born with an extra finger. No shading indicates people who do not have an extra finger. A question mari means it is unknown. Mitchell is #8 on the pedigree and grandmother is #2. Based on the pedigree what do you predict members number 12 number 11 and 13.

Answers

Answer:

b.

Explanation:because means same genes and the parents have the same genes

Fossils of the Dorudon, an aquatic mammal that lived over 40 million years ago, show a whale-like animal that had small underdeveloped hind limbs.
Which best explains how fossils like the Dorudon support the theory that plant and animal life has evolved over time? (SC 7.L.15.2
They confirm that many animals have not evolved
O They confirm that many animals have not evolved
ооо
They prove that all animals evolved from a single ancestor
They demonstrate that animals that don't evolve will die out

Answers

Answer:

??

Explanation:

What is the answer cuz i am doing to test rn

Answer:

they prove that animals evloved from a sinle anncestor

PLS VOTE BRAINLIEST

Need answer quick please thanks

Answers

1.) Adenine and Thymine (A&T)
because...I learned A pairs with T; C pairs with G.

2.) I can’t see the options..

What distinguishes each element from all others, and gives it unique physical and chemical properties?

Answers

Answer:

this is the answer hope it helps

be

Which is all of the organisms found on earth and all of the areas in which they live
A. Ecosystem
B. Biome
C. Species
D. Biosphere

Answers

Answer

ecosystem

Explanation:

because a biome is s a collection of plants and animals that have common characteristics for the environment they exist in. They can be found over a range of continents. Biomes are distinct biological communities that have formed in response to a shared physical climate.

Answer:

Biosphere

Explanation:

I took the test and got it right. Hope this helps!

What are two ways that eating certain kinds of milkweeds help monarch butterflies survive?

Answers

Answer:

When monarchs eat the milkweeds,they become toxic to other animals because the milkweeds carry toxins in them that only they can eat. Also some milkweeds can help cure their disease and parasites to make them uninfected.

Explanation:

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