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 statements describe proteins? Select three options

Answers

Answer:

Proteins are created from the code in DNA.

Amino acids are the building blocks of proteins.

Proteins affect the structures and functions of living things.

Explanation:

Hope this helped you:D

Proteins are created from the codes in DNA

What is the genotype of individual #1

Answers

Answer:

The genotype for #1 is ff

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

Many rain forest plants are prone to developing fungal infections on their leaves. Fungi can grow rapidly in moist environments, and a serious infection can kill plants

Answers

Answer:

Resistance plants increase in number whereas non-resistant plants decreases.

Explanation:

The environment of rain forest is suitable for the fungal growth because of the presence of humidity in the environment and we know that fungi needs moist places for its growth. These fungus attached on the leaves and takes nutrients from that plant that leads to the stunted growth and many cases death of the plant occurs. Some plants have no effect of this fungus due to the presence of resistance in them so if the fungus spreads in the whole forest so the plants which are prone to these fungal infections eliminated from that environment and resistant plants are increase in number.

Answer:

Part B

Many rain forest plants are prone to developing fungal infections on their leaves. Fungi can grow rapidly in moist environments, and a serious infection can kill plants. One rain forest plant species has a genetic variation that affects its leaf structure. The traits and the descriptions of the plant’s leaves are listed in the chart.

Explanation:

pls help i need to pass this!
Which of these structure types is composed of alternating layers of lava and cinders?

cinder cone
stratovolcano
shield volcano
none of these

The VEI of a volcano’s eruption is based on

the amount of tephra produced.
the height of the eruption cloud.
a descriptive estimate of the explosion.
all of these.

Answers

Answer:

1. Cinder cones

2. All of these

Explanation:

1. Cinder cones develop from explosive eruptions of mafic (heavy, dark ferromagnesian) and intermediate lavas and are often found along the flanks of shield volcanoes. The outside of the cone is often inclined at about 30°, the angle of repose (the slope at which the loose cinder can stand in equilibrium).

2. Volcanic Explosivity Index (VEI) is a numeric scale that measures the relative explosivity of historic eruptions. Volume of products, eruption cloud height, and qualitative observations (using terms ranging from "gentle" to "mega-colossal") are used to determine the explosivity value. The Volcanic Explosivity Index (VEI) was derived to catalogue the explosive magnitude of historical eruptions, based on the order of magnitude of erupted mass, and gives a general indication as to the height the eruptive column reached.

Hope this helps!

Which of these describes a temperate rainforest?
cooler; long, wet season; short, dry season
hot; varying to warm in the winter
O warm; no seasons present
O temperatures vary from season to season; daily precipitation

Answers

Answer:

a long and wet winter but and short and drier summer. option one i think

Explanation:

Temperate rainforests are characterized by cooler; long wet season and short dry season.

The features of temperate rainforests:

One of the world's major habitats is the temperate forest biome. These forests are characterized by humidity and high levels of precipitation. The temperate rainforests exhibit a broad array of temperatures, which correlate with the different seasons.

Temperature ranges from extremely cold in the winter and hot in the summer. The forests receive enough amounts of precipitation, generally between 20 to 60 inches of rainfall in a year. The temperate rainforests have a short dry season, while cooler and long wet seasons.

Thus, the correct statement is the first one, that is, cooler and long wet season and short dry season.

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PLZZZZZ HELPPPPPPP!!!!
Neurons have long projections to transmit impulses. What is the name of these projections?
Answer:

Answers

Answer:

Axon

Explanation:

An axon is a long, slender projection of a nerve cell, or neuron, that typically conducts electrical impulses away from the neuron's cell body or soma.

Can I have brainliest, when someone else answers?

Answer:

I agree with the other person who answer

have a good day :)

Explanation:

Brainliest involved

Answers

Answer:c

Explanation:

Can someone paraphrase this for me? It needs to be like 2-3 sentences (Please don't answer the things just paraphrase them together! 10 points)!

explain that every organism requires a set of instructions that specifies its traits
explain the difference between dominant and recessive traits or alleles
recognize phenotype as the physical expression of the genotype
recognize genotype as the collective sum of all alleles and their specifying traits
analyze animals to demonstrate evidence of the hereditary information that is passed from one generation to another

Answers

Answer:

explain that each organism needs a group of directions that specifies its traits

explain the distinction between dominant and recessive traits or alleles

recognize constitution because the physical expression of the genotype

recognize genotype because the collective add of all alleles and their specifying traits

analyze animals to demonstrate proof of the hereditary data that's passed from one generation to a different

I'm in 9th grade going into 10th should I take chemistry or geoscience?
and online or in-person

Answers

I’m not too sure what geoscience is, is it like earth science or..? Anyways I took chemistry online this year and I think it’s ok to say I would have rather taken it in person, just because chemistry can sometimes be confusing -at least for me, and I’m generally a smart person oof. Ik my answer may be biased because i took earth science in middle school and chemistry now (10th grade), but I would say take chemistry. If you take chemistry now then a LOT of things will make sense and if you do geoscience in 11th grade or smth it may be a lot easier to understand.

Answer:

I am honestly having the same questions. I think which one sounds the most for your level or onto collage applications! Now I was thinking about online for some people it's easy. But it's easily distracted. You have more freedom to roam the internet. Scroll through Insta. Or play video games. Now that seems really awesome. But my grandma says 9th grade is the most important year. It determines whether if you need help or if you fail you spend the res of your years catching up. I also am going into 10th and these words are scary.

Explanation:

I don't want to go to school because I feel once the friends I made online see me.. They will change their minds.. But even though I know going in person where I pay attention better is the best shot.

Anyways hope this helped have a wonderful day! <33

Why should a scientist repeat the same experiment several times before reporting the results?
Helpp

Answers

Answer:

Because is the systematic observation, evaluation of facts and ideas

Explanation:

In scientific methods you have to find the problem, find solution experiment on it several times so that it will be accurate enough then you draw conclusion that is why scientists experiment several times to verify the solution

scientists repeat an experiment to draw a valid conclusion

. Some people taste the chemical phenylthiocarbamide (PTC) as intensely bitter, while others cannot taste it at all. PTC is similar to chemicals in broccoli, Brussels sprouts, and cabbage, among other plants. Tasting PTC is a dominant trait; non-tasting is recessive. About 51% of people of European descent are tasters. If all of the assumptions of Hardy-Weinberg equilibrium are met, then among people of European descent... a) What is the frequency of the non-taster phenotype

Answers

Answer:

The frequency of the non-taster phenotype among people of European descent is 49% or 0.49

Explanation:

Let us assume that the allele for tasting PTC is T, while that for not tasting PTC is t.

According to the Hardy-Weinberg equation : p² + 2pq + q² = 1

Also p + q = 1

Where p² is the frequency of individuals with the TT genotype for tasting PTC,; wow is the frequency of individuals with the heterozygous allele for tasting PTC, while q² is the frequency of the individuals with tt genotype expressed as the non-taster phenotype since the allele for tasting is dominant over that of the non-taster.

From the information provided 51% of people of European descent are tasters. Also, tasting PTC is dominant over non-tasting. This implies that individuals with TT genotype and Tt genotype will be phenotypically expressed as tasters.

Therefore p² + 2pq = 51% or 0.51

q² = 1 - p² + 2pq

q² = 1 - 0.51

q² = 0.49 or 49%

The frequency of the non-taster phenotype among people of European descent is 49% or 0.49

A student keeps an onion bulb in a jar filled with water and observes that the roots continue to grow in length. The student cuts a root tip and observes it under a microscope. The image shows the observations. Which option supports the reason for an increase in the root’s length?The root cells undergo meiosis to expand and increase in length.
The root cells undergo mitosis to combine together to make the root grow.
The root cells undergo mitosis to form new identical cells.
The root cells undergo meiosis to form different types of cells.

Answers

Answer:

The root cells undergo mitosis to form new identical cells.

Explanation:

Mitosis is the process of cell division, where a cell divides into two equal cells with the same number of chromosomes. These new cells are used to promote the growth of a biological structure, promoting an elongation, a replacement, a concert, or an increase in volume. This can be seen in the case of the growth of the tip of the onion root, where the cells underwent mitosis, forming equal cells, to promote the growth of a new tip.

define ammonotelism?​

Answers

Answer:

The process where certain organisms excrete nitrogenous waste in the form of ammonia is known as Ammonotelism.

Explanation:

Ammonotelism is the process of excretion of ammonia and ammonium ions. Such animals are called ammonotelic.

En los seres vivos acuaticos el oxigeno es tomado del __________ y penetra a la celula por el fenomeno de ___________

Answers

Answer:

En los seres vivos acuáticos el oxigeno es tomado del agua y penetra a la célula por el fenómeno de respiración branquial.

Explanation:

La respiración es el proceso mediante el cual los seres vivos obtienen oxígeno.  Es decir, la respiración implica el reemplazo del dióxido de carbono en los pulmones por oxígeno del aire, y puede ser pulmonar, branquial, traqueal o cutánea.

La respiración branquial es un tipo de respiración propia de la mayoría de los animales acuáticos y se lleva a cabo en las branquias, unas estructuras con forma de láminas que contienen vasos sanguíneos. Los animales acuáticos dispone de estos órganos que permiten absorber el oxígeno que se encuentra en el agua y eliminar el dióxido de carbono.

El agua que entra por la boca y circula por las branquias, donde el oxígeno es absorbido, pasa a la sangre y es transportado a todo el cuerpo donde se produce una respiración celular.

Es decir, en los seres vivos acuáticos el oxigeno es tomado del agua y penetra a la célula por el fenómeno de respiración branquial.

Cellular differentiation progressively restricts cell fate because the unexpressed genes in the cell:Select all that apply become more densely packed with nucleosomes accumulate both point mutations and deletions accumulate point mutations undergo irreversible repression accumulate deletions.

Answers

Answer:

undergo irreversible repression

Explanation:

Cellular differentiation refers to the process by which one cell and/or cell population divides and differentiates into more specialized cells. During cell fate differentiation, epigenetic marks modify chromatin structure in order to hamper the accessibility of the transcriptional machinery and transcriptional factors to different genes, which are irreversibly repressed. These epigenetic marks include DNA methylation and histone modifications (e.g., histone acetylation, histone methylation, etc). For example, it has been shown that DNA methylation and histone H3 lysine 27 tri‐methylation (H3K27me3) are epigenetic repressive marks on genomic regions that play a major role in gene expression programs during cell fate differentiation.

history of fossil fuels & how fossil fuels are formed

Answers

Answer:

Fossil fuels are compound mixtures made of fossilized plant and animal remnants from millions of years ago. The creation of fossil fuels—either oil, natural gas, or coal—from these fossils is determined by the type of fossil, the amount of heat, and the amount of pressure

what role does the suns energy play in the formation of minerals from solutions?

Answers

Minerals can form in a solution through evaporation. The sun plays an important in this process because it provides the heat energy that is necessary for evaporation to take place.

An image of an influenza virus is shown. The spike-like structures that cover the virus are surface proteins.
What is the function of the surface proteins on the influenza virus?

Answers

Answer:

D. to remove a host cell's DNA

Explanation:

I hope that this helped you :D

Answer:

I got it right... this is a first choice D) to remove a host cell's DNA

Explanation:

thank you!

give me a mark for brainly

Explain why the one bone/two bone/many bones/digits limb pattern is important in explaining the origin of tetrapods.

Answers

Answer is in the file below

tinyurl.com/wpazsebu

Getting to know the number and pattern of bones in limbs is important to understand the evolution of tetrapods.

---------------------------------------------------------

Fossils are animal and vegetable rests found in different strata of sedimentary rocks. Sedimentary layers deposit chronologically, so they are used to reflect history. These fossils turn to be very useful while dating ages and studing evolutive processes.

Fossils provide good information about the existing relationship between ancient and modern tetrapods. Limb structures between these organisms are relatively similar. However, they can change in the number of bones and their arrangement pattern, reflecting the changes that species suffered through evolution.

The pattern in which the composing bones are arranged in limbs is useful to study tetrapods evolution, from a common aquatic ancient -fish- to modern terrestrial and aquatic tetrapods.

By looking at the number of limbs and digits, and the bones' pattern involved in these structures, scientists could interpret how evolutive processes occurred.  Information about bones' density, length, and size, is also useful to understand the environmental pressures acting on the animals, and how the tetrapods managed to adapt.

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The presence of which magnetic feature best explains why a magnet can act at a distance on other magnets or on objects containing certain metals?
O fields
O dipoles
O domains
O forces

Answers

Answer:

Option: A) fields

Explanation:

Answer: A) Fields

Explanation:

I just took the test.

If you have a 15% salt water solution, how many grams of salt do you have if you have
50 ml of water
7.5 grams
05 grams
30 grams
15 grams

Answers

.15*50ml=7.5 grams of salt

Answer:

7.5 grams

Explanation:

I took the Exam and this was correct.

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:

As a part of the life cycle of plants, the plant must begin with an embryo. What statement best describes where the embryo can be found in flowering and non-flowering plants?

Answers

The missing statements are given as follows:

a. In a flowering plant, the embryo is in seeds found in the flower, and in non-flowering plants, the embryo is in seeds found in the cone.

b. In a non-flowering plant, the embryo is in spores found in the stem, and in a flowering plant, the embryo is in seeds found in the flower.

c. In a non-flowering plant, the embryo is in seeds in the leaves, and in a flowering plant, the embryo is in seeds found in the spores.

d. In a flowering plant, the embryo is in spores found in the flower, and in a non-flowering plant, the embryo is in seeds found in the spores.

Answer:

The correct answer is - option a. In a flowering plant, the embryo is in seeds found in the flower, and in non-flowering plants, the embryo is in seeds found in the cone.

Explanation:

Non-flowering plants especially gymnosperms begin their life cycles from the embryo found inside the seeds like the flowering plants however, in gymnosperms these are found in the cone.

In the flowering plants, the embryo is present in the seeds present in the flower that develop into fruits too. Angiosperms are the flowering plants that produce seeds.

Thus, the statement best describes where the embryo can be found in flowering and non-flowering plants.

Answer:

In a flowering plant, the embryo is in seeds found in the flower, and in non-flowering plants, the embryo is in seeds found in the cone.

Explanation:

Why are the oceans movements along the shore called waves? What do ocean waves have in common with sound and light

Answers

Answer:

It has crust and trough.

Explanation:

The oceans movements along the shore called waves because it has crust and trough just like waves and vibrates about its mean position. A crest is a higher point of wave whereas trough is the opposite of a crest and lowest point of a wave. Ocean waves is similar to sound and light waves because both waves travel as up and down vibrations and the energy present in these wave travels in forward direction.

write four sentences on the basis of the given picture ?​

Answers

Answer:

A little girl is playing with her dog with a ball.

An old woman (I could be wrong, it could be the 'mother')brought some drinks to the family.

A man (or the father) is reading a newspaper on his chair by the desk.

A little boy is playing with his grandparents.

Explanation:

if this is not correct, please tell me

in the plasma, ___ with platelets to form blood clots. A. Hemoglobin interacts. B. Lymph interacts. C. Red blood cells interact. D. White blood cells interact

Answers

Answer:

C. Red blood cells interact. ........

what would a genetic mutation most immediately affect

Answers

Answer:

The structure of one or more proteins produced by the organism.

Explanation:

Genetic mutation can also can cancer 5 - 10% of the time.

can someone help plsss

Answers

Answer:

Chewing the gummy bear and crunching the apple would be mechanical. The stomach one would be chemical.

Explanation:

I hope this helps. The mechanical reaction or use would not include producing a new product, or breaking it down into something else. That would be chemical. Because of this, the digestion would have to be chemical. (because it is breaking it down to be made into something new.)

Which of the following statements is not true of energy production in cells?

In cells, energy is released in small, controlled amounts
In cells, energy is released in small, controlled amounts

ATP is the primary form of energy for the cell.
ATP is the primary form of energy for the cell.

Cells release large amounts of energy in the form of heat.

Answers

Answer:

The third statement is not true.

Explanation:

Cells release small amount of chemical energy from glucose.

The correct answer is: "Cells release large amounts of energy in the form of heat."

Cells release energy by the process of cellular respiration.

A cell is the smallest unit of a living organism which can have independent existence.

Cells obtain energy by the process of cellular respiration. During cellular respiration, during cellular respiration, the energy stored in glucose is transferred to ATP.

The process of cellular respiration releases energy in cells in small controlled amounts.

For the products of cellular respiration, see:

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