Female mosquitoes need a meal of blood from a person or other animal in order to produce eggs. It has been discovered that mosquitoes have cells on their antennae that can detect the insect repellent known as DEET. The repellent is not harmful to mosquitoes, but when mosquitoes detect DEET, they will not land on the surface where the DEET has been applied. This protects people from being bitten by mosquitoes. Recently, scientists found some mosquitoes that are resistant to DEET because they do not detect its presence. They bred these mosquitoes and eventually produced a population consisting of about 50% DEET- resistant insects. Identify the process most likely responsible for a mosquito initially becoming resistant to DEET.

Answers

Answer 1

Answer:

Mutation followed by natural selection made mosquitos resistant to DEET

Explanation:

Natural selection selects beneficial alleles, which increase their frequency in the population, resulting in adaptation. Aptitude, which is the contribution of each genotype to the next generation, increases too.  

In many cases adaptations, resulting from the natural selection process can be correlated to environmental factors or selective pressures applied by other organisms or habitats.  

Let us remember that, a mutation is a change or alteration in DNI sequences that introduce new variants. Many of these are eliminated, but some of them might succeed and be incorporated into each individual. These mutations are the ones that have been selected by natural selection.

So, in the exposed mosquitos´ example,

The selective pressure or modeling environmental factor is the DEET repellent.Some of the mosquitos mutated changing their behavior.  The new mosquito´s response is not-detection of the repellent presence -only in those individuals carrying the mutations-.  Natural selection benefits these mutations.  Mosquitos survive and become more resistant  

Probably some of the mosquitos in the population suffered a mutation that favored them in not detecting repellent DEET. These individuals developed resistance to the chemical and were able to survive and reproduce, enhancing population sizes again. Natural selection benefited the mutation that gave them resistance.

Let us remember that the term resistance refers to an inheritable change in the population sensitivity, reflected through the consecutive failure of the chemical effects, correctly used in order to cause an effect on the insect population.  

Repellents might produce a genetic modification in the insects, leading them to not detect the chemical. Insects evolve with the capability of tolerating the DEET dose that normally is used to repel mosquitos

The excessive use of DEET leads to the fixation of new genes -by natural selection- that result from mutations in the mosquito genetic material, which makes them become even more resistant to the chemical.


Related Questions

What do hypothesis, theories, and laws have in common ?

Answers

i have a great time today lol i i did

A biology teacher asks his class to make models of a plant cell, an animal cell, and a bacterial cell. Aside from cytoplasm and the cell membrane which other cell structure will the students need to make all three models?


A. Ribosome
B. Nucleus
C. Golgi Apparatus
D. Chloroplast
E. Cell wall​

Answers

The answer would be B

What happens to cause air to be exhaled from the lungs?
A)The rib muscles contract and move upward
B)The chest cavity expands and grows larger
C)The diaphragm relaxes and moves upward
D)The lungs contract and expand

Answers

Answer:

The answer is C.

Explanation:

When you breathe out or exhale, your diaphragm relaxes and moves up into your chest cavity. As the space in your chest cavity gets smaller, the air rich in carbon dioxide is forced out of your lungs and windpipe, and then out your nose or mouth.

answer: C: The diaphragm relaxes and moves upward

helpppppppppppppppp meeeeee plzzzzzzzzzzzz

Answers

Answer:

Im not a 100% but i think it's option C, if not then it has to be B

Hope this helps!

Should people be allowed to use gene therapy to enhance basic human traits such as height intelligence or athletic ability?

Answers

Answer:

no, of course not

Explanation:

Would you use drugs to gain a competitive advantage in sports? No, its against the rules and also unethical. It's not healthy. You've seen Jurassic Park right? It would lead to ruin.

what is photosynthesis​

Answers

The process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water.

Answer:

please tell me you know, my hands are literally shaking at how easy this question is

Explanation:

the answer is photosynthesis is a way for plants to make oxygen

still not enough information? they convert carbon-dioxide and water into oxygen and sugar, so they eat the sugar making their own food, put plants are living if they eat sugar. so they also have cellular respiration from mitochindria (photosynthesis is from chloroplasts and chrolophyll inside the chloroplast) and plants BREATH OUT SOME CARBON-DIOXIDE and produce more Oxygen than carbon-dioxide, thus providing the earth with Oxygen

please answer this for me

Answers

the answer is D !!!!!!!

Answer:

maco shark

Explanation:

It is a fast speed-swimming shark that has been called “the peregrine falcon of the sharks” in allusion to the fastest bird in the world. It is considered an animal dangerous to humans because of the speed which can attack and its ability to jump into the fishing boats.

If you had access to these scientists, (in the Netherlands) what questions would you ask them in order to clarify evidence of the factors that have caused the rise in global temperatures over the past century? Write two questions using two different perspectives: one from a person who might be in agreement with the scientists and one who is skeptical of this court ruling and environmental activists around the world.

Answers

how does your job ,scientist contribuite to the global concern of the global warming.?

is there any scientific explanation or a way to make the earth's temperature normal?

do u think that being a scientist itself is a harm to the environment?

have u dobe anything or any research on the ways to get the earth back to its normal temperature?

Which graph represents selection that may lead to reduced variation
in a population?

Answers

The frequency graph represents selection that may lead to reduced variation in a population.

fungi and bacteria are_____.
-plants -producers -decomposers

Answers

Answer:

decomposers

Explanation:

Answer:

decomposer

Explanation:

Fungi and bacteria are the most common decomposers.

Identify the statement that describes the imperfection of natural selection. Identify the statement that describes the imperfection of natural selection. Natural selection has not had sufficient time to create the optimal design in each case but will do so given enough time. Natural selection is generally limited to modifying structures that were present in previous generations and in previous species. In many cases, phenotype is not merely determined by genotype but by the environment as well. Though we may not consider the fit between the current skeletal arrangements and their functions excellent, we should not doubt that natural selection ultimately produces the best design.

Answers

Answer:

Variability was seen as imperfection, so natural selection could only eliminate the inferior and imperfect, not giving rise to new things, new species.

:

the more mass an object has, the more _____ it needs in order to move. A. Force B. Inertia​

Answers

Answer:

Force it need in order to move

Answer:

A. force

Explanation:

inertia is that it keeps moving force gets it moving

What happens in the anther?
A. Eggs are made

B. Photosynthesis takes place

C. Pollen is produced

Answers

The answer is C.

I really hope this helps :)

Answer:

C. Pollen is produced

Explanation:

The pollens are produced in the anther. So, option (C) is the correct answer.

Based on the trends you observed in the laboratory exercise, which objects would you expect to be attracted to a bar magnet? Check all that apply.

a metal hammer
a wooden ruler
a plastic car
the metal frame of your chair
the paper in your notebook
the screws and nails that hold your desk together

Answers

Answer:

The correct answer is - 1. a metal hammer

4. the metal frame of your chair

6. the screws and nails that hold your desk together.

Explanation:

Bar magnets are rectangular objects made up of ferromagnetic objects or substances and must carry the north and south pole ends. These objects show ferromagnetism and attract any ferromagnetic metal such as iron, steel  or ferromagnetic composite.

In the case of the same ends, for instance, the north-north pole of two magnets repulse and opposite attract to one another. From the given options the correct answer is a metal hammer, the metal frame of chair and screws and nails that hold the desk.

Answer:

A.)

D.)

F.)

Explanation:

The person above me is correct, please say thanks to them

Explain how specialized structures found in multiflora rose support its reproduction and spreading/dispersal throughout ecosystems in the United States. Use evidence and scientific reasoning to support your response.

Answers

Answer:

Presence of thorn stems, invasive nature and strong scent of of multi rose plant.

Explanation:

The presence of thorn stems, invasive nature and strong scent of of multi rose plant are the specialized structures found in multiflora rose support its reproduction and spreading and dispersal throughout ecosystems in the United States. The presence of thorn stems prevent animals to feed on the multi rose plant while on the other hand, strong scent of of multi rose flower attract pollinators that increase its pollination and increase occur in its population.

Be a Lunatic
A solar eclipse happens when --
the sun is directly between Earth and moon
the moon is in Earth's shadow.
the moon is directly between Earth and sun.
the sun blocks out light from Earth.

Answers

c- the moon is directly between earth and the sun

When the Moon passes between Sun and Earth, the lunar shadow is seen as a solar eclipse on Earth. When Earth passes directly between Sun and Moon, its shadow creates a lunar eclipse. Lunar eclipses can happen only when the Moon is opposite the Sun in the sky, a monthly occurrence we know as a full Moon.

Explanation: im just smart like that

what allows for differences between individuals due to differences in inherited DNA?
a. genetic variation
b. meiosis
c. interphase
d. mitosis

Answers

I looked at my notes and it seems to be A) Genetic variation, but I’m really sorry if it’s wrong

where are 70s type of ribosomes found in eukaryotic cells.​

Answers

They are found in the cytosol

Which list shows organization of living things from the simplest to most complex?
A organ system, organ, tissue, cell
B tissue, cell, organ, organ system
C organ, organ system, cell, tissue
D cell, tissue, organ, organ system

Answers

Answer:

d

Explanation:

Because you need the cell to become tissue then the tissue Becomes organs then a bunch of organs become a organ system

The picture above shows onion root cells in various stages of mitosis.
The arrow is pointing to a cell in -

Answers

Answer:

Anaphase.

Explanation:

You can see the separation happening. This is anaphase.

Hope this is correct, good luck on your studies.

los derechos sexuales son iguales a los reproductivos? porfa help

Answers

El teme son up poco differente porque hay differentes lados

Your nervous system includes the brain and spinal cord

A. True

B. False

Answers

Answer: A

Explanation: The nervous system is the brain and spinal cord.

Answer:

A. True

Explanation:

The variable your measuring during an experiment would be the?

Answers

responding variable

manipulated variable is equal to the independent variable. it's like the "cause" of your outcome, which is your dependent or responding variable that you have to measure the results of.

EZ POINTS GRADE 2 SCIENCE PLEASE ANSWER FUE TOMRROWAEfKEAFEAS
fill in the blanks wiht the words givewn below

Answers

Answer:

1.) tides

2.) Salinity

3.) Oceans

4.) reef

5.) Intertidal Zone

6.) Neritic Zone

7.) Benthic Zone

8.) Reef

9.) Estuary

10.) Marine Biome

Hope this helps!

Which of the following describes the relationship between genes and
chromosomes?

Chromosomes form into genes during cellular reproduction

Genes are special sequences of nucleic acids found on chromosomes

Every gene an organism has is found on every one of its chromosomes

All of an organism's chromosomes can be found next to its genes in the cell nucleus

Answers

Answer:

Genes are special sequences of nucleic acids found on chromosomes.

Explanation:

A single DNA molecule is a chromosome. A gene is a certain chromosome region of DNA.

All cells of the body are genetically the same, but cells are different from others because specific gene sets are expressed. Different cells, therefore express different genes, which enable them to perform a specific function.

The deoxyribonucleic (DNA) genes are segments that contain a code for a certain protein that works in one or several cell types in the body. Chromosomes are cellular structures that contain the genes of a person. Genes that are in the cellular nucleus are contained in chromosomes.

Describe how the lizard population is changing

Answers

Answer:

Each time lizards colonized an island, they evolved into many of the same forms. .Other lizards adapted to life among the thin branches lower down on the trees, evolving short legs that help them hug their narrow perches. Still other lizards adapted to living in grass and shrubs, evolving long tails and slender trunks.Lizards are low on the food chain. Providing protection from their natural predators ensures their continued existence. Plant bushy perennials, create a rock or brush pile or use man-made items like stacks of bricks or pipes.

Olivia is on a swing at the playground.
If the swing is moving from W to Z, at which point is her
kinetic energy increasing and her potential energy
decreasing? (based on a starting point of W)
Ow
OX
z
OY
3
Oz
Х
Y

Answers

Answer:

C. Y

Explanation:

The point that the kinetic energy increasing and its potential energy decreasing is Oz.

How to measure kinetic energy?

To calculate the kinetic energy of an object with mass “m” and speed “v”, we must apply the formula Ec = mv²/2, where: Ec – kinetic in joules; m – mass in kg; v – speed in m/s.

What is potential energy?

Gravitational potential energy that depends on the vertical position and mass of an object.

With this information, we can conclude that The point at which the kinetic energy increases and its potential energy decreases is Oz.

Learn more about kinetic energy in brainly.com/question/999862

Mendel crossed yellow-seeded and green-seeded pea plants and then allowed the offspring to self-pollinate to produce an F2 generation. The results were as follows: 6,022 yellow and 2,001 green (8,023 total). Which of the following statements correctly describes the relationship of the allele for green soods to the allele for yellow seeds? A. The green allele is dominant to the yellow allele B. The two alleles exhibit incomplete dominance C. The green alicle is recessive to the yellow allele D. The two alleles are codominant

Answers

Answer:

C. The green allele is recessive to the yellow allele

Explanation:

Complete dominance occurs when one gene variant or allele referred to as the 'dominant allele' completely masks the expression of another allele referred to as the 'recessive allele' in heterozygous individuals, i.e., in individuals carrying one copy of the dominant allele and one copy of the recessive allele for a particular locus/gene (whereas homo-zygous individuals carry the same alleles for a given locus/gene). Mendel crossed pure lines of pea plants, i.e., homo-zygous lines for different traits such as seed color (yellow and green) and seed shape (round and wrinkled). In this case, the parental cross was YY x yy, where the 'Y' allele is dominant and encodes for yellow seed color, and the 'y' allele is recessive and encodes for green seed color. From this cross, Mendel obtained a hybrid F1 (i.e., all progeny was heterozygous with genotype Yy). An expected 3:1 ratio as observed in this case (6,022 yellow and 2,001 green seed >> 3:1 ratio) is characteristic of the progeny that results from mating between F1 heterozygous parents, where each parent has one dominant allele and one recessive allele, i.e., F1 parental cross: Yy x Yy >> F2: 1/4 YY (yellow color); 1/2 Yy (yellow color); 1/4 (green color) >> 3:1 ratio of yellow to green seeds.

easy biology question below first correct answer gets brainliest

Answers

Answer

B

Explanation:

if,k

Answer:

the answer is ....C

.........

What are the raw materials (reactants/goes into) for photosynthesis?
A. water and glucose

B. carbon dioxide and water

C. glucose and oxygen

Answers

Answer:

c

Explanation:

Carbon Dioxide and Water. Disregard other answer.
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