what type of selection causes a shift in advantageous traits

Answers

Answer 1

Answer:

Natural Selection

Explanation:

In population genetics, directional selection, or positive selection is a mode of natural selection in which an extreme phenotype is favored over other phenotypes, causing the allele frequency to shift over time in the direction of that phenotype.


Related Questions

Which of the following is NOT consistent with the concept of natural
selection?
A. Individual organisms are able to change their genetic adaptations in
order to better survive in changing environments.
B. More offspring are produced than can survive in an environment
(overproduction of offspring).
C. There is genetic variation within populations.
D. Organisms with beneficial variations are more likely to survive and
reproduce, passing on their genes to subsequent generations.
Click to choose your answer helow:

Answers

Answer:

A. Individual organisms are able to change their genetic adaptations in

order to better survive in changing environments.

Explanation:

Natural selection can be defined as a biological process in which species of living organisms having certain traits that enable them to adapt to environmental factors such as predators, competition for food, climate change, sex mates, etc., tend to survive and reproduce, as well as passing on their genes to subsequent generations.

Simply stated, natural selection entails the survival of the fittest. Therefore, the species that are able to adapt to the environment will increase in number while the ones who can't adapt will die and go into extinction.

The statements which are consistent with the concept of natural selection includes;

I. More offspring are produced than can survive in an environment (overproduction of offspring). This ultimately implies that, the more offsprings that are reproduced by the parent organism, the more likely are they to survive.

II. There is genetic variation within populations. This simply means that tere is a better chance of having good or beneficial traits being passed from the parent organism to her offsprings.

III. Organisms with beneficial variations are more likely to survive and reproduce, as well as passing on their genes to subsequent generations.

Which of the following phrases best describes the function of meiosis?
Group of answer choices

produces genetically unique diploid cells

produces genetically identical haploid cells

produces genetically unique haploid cells

produces genetically identical diploid cells

Answers

Answer: C.) Produces genetically unique haploid cells

Explanation: Meiosis will produce genetically unique cells because they are meant to pass onto offspring, and they are haploid because there are half the number of chromosomes in them. The organism will receive 2 sets, one from each parent, so that is why each parent who's cells undergo meiosis have to produce haploid cells.

Why is it a good idea for humans to create models of how populations are changing?
What do models help us do?

Answers

So we can look back and see how much we have accomplished in the year with the models

An increased cardiac output will provide more oxygen and more glucose to the working muscles.
Explain how this helps the athlete during exercise.

Answers

Answer:Let's dance

Put on your red shoes and dance the blues

Let's dance

To the song they're playin' on the radio

Let's sway

While color lights up your face

Let's sway

Sway through the crowd to an empty space

If you say run

I'll run with you

And if you say hide

We'll hide

Because my love for you

Would break my heart in two

If you should fall into my arms

And tremble like a flower

Let's dance

Let's dance

For fear your grace should fall

Let's dance

For fear tonight is all

Let's sway

You could look into my eyes

Let's sway

Under the moonlight, this serious moonlight

And if you say run

I'll run with you

And if you say hide

We'll hide

Because my love for you

Would break my heart in two

If you should fall into my arms

And tremble like a flower

Let's dance

Put on your red shoes and dance the blues

Let's sway

Under the moonlight, this serious moonlight

Let's dance

Let's dance

Let's dance, dance, dance

Explanation:

Can someone PLEASE answer these questions QUICKLY

Answers

1. Radiometric, Relative
2. Radiometric Dating
3. Relative Dating

An organism has died next to a river.
Describe how that organism could become a fossil.

Answers

Answer:

Being buried in sediment

Explanation:

The river floods and catches the organism's corpse, the river carries it to a larger body of water, and the corpse falls to the bottom of the body of water, over time sediment is deposited over the corpse.

I agree with that being buried in sediment because is the correct answer

Complete a Punnett square that shows a test cross for a tall pea plant (RR x rr). Place the plant to be tested at the top of the Punnett Square.

Answers

I'm not 100% sure what you're asking but is this what you mean?

All plants are tall.

        r           r

R      Rr         Rr

R      Rr         Rr

Answer: In pea plants, a tall stem is dominant (R) over a short stem (r).

This means the genotype of the tested plant is RR so that one would be on top of the Punnett's square.

The Punnet's square would be as follows:

(I got this right on my assignment)

What does the theory of evolution contribute to conservation biology?

A) It helps scientists understand how populations and species are related, and this knowledge can be used to help these populations and species survive.

B) It helps scientists understand how populations and species are related, and this knowledge can be used to capture and breed the fittest organisms in these populations and species.

C) It helps scientists understand how populations and species react to changes in their environment, and this knowledge can be used to help these populations and species survive.

D) It helps scientists understand how populations and species react to changes in their environment, and this knowledge can be used to capture and breed the fittest organisms in these populations and species.

Answers

i’m pretty sure it’s d but it could be c

The answers to The History Of Evolutionary Theory quiz.

1. A. natural selection, migration, and mutation

2. C. the production of pesticide-resistant potatoes.

3. A. It is based on the idea that all life is related.

4. B. It explained how evolution works.

5. B. They can be passed on to offspring.

6. C. the genetic variations that are best suited for their environment

7. D. the best explanation for a set of data and observations

8. C. a change in a population's gene pool

9. C. It helps scientists understand how populations and species react to changes in their environment, and this knowledge can be used to help these populations and species survive.

10. C. When exposed to antibiotics, most bacteria in a population die, but some survive and live to reproduce.

Edge 2021

Which of the following lives in the pelagic zone?
sea birds
crabs
plants
fish

Answers

Usually many large ocean vertebrates, mostly large fish as well as sea turtles and cetaceans ,etc.

Which part of meiosis mirrors mitosis?

Answers

Meiosis 2 is similar to mitosis because it separates the chromosomes to have sister chromatids in each cell. In both processes, you are separating the chromosome and dividing the cell to make 2 cells out of 1 (the only difference is that in meiosis, you're doing that for 2 cells to get 4).

How many X chromosomes do males have? _______

Answers

Answer:

There are 2 sex chromosomes – X and Y. Females have 22 autosomes and two X chromosomes, i.e., 22 + XX, while males have 22 autosomes and an X and Y chromosome each, i.e., 22 + XY. hope it helps.

basically 22

Explanation:

Answer:

one

Explanation:

females have two and males have one

The half-life of carbon-14 is 5370 years. The carbon-14 levels in a fossil indicate that 6 half-lives have passed. How old is the fossil?
PLEASE ANSWER FAST!!!!!!!



75,200 years

35,000 years

32,220 years

50,000 years​

Answers

5370 x 6 = 32,220 so that would be your answer :) if I did it correctly.

Name the 2 stages of photosynthesis

Answers

Answer:

Light dependent reaction and the Calvin cycle

Explanation:

pls mark me brainliest

1. Light dependent reactions
2. The calvin cycle
Hope this helped!

How, do humans use mineral and
Energy resources?
A. Environmental protection
B. To build machinery
C. Industrial purposes and crop
irrigation
D.
To discover new elements

Answers

I think the answer is c

what can be analyzed to determine how many base pairs a segment of dna has?

Answers

The total number of base pairs is equal to the number of nucleotides in one of the strands (each nucleotide consists of a base pair, a deoxyribose sugar, and a phosphate group).

A geneticist is studying two traits in corn: kernel color and kernel appearance or ‘shine'. The R/r alleles determine kernel color (R – purple color; r – yellow color). The W/w alleles determine kernel ‘shine' (W – waxy; w – dull). The geneticist crosses two corn plants that are Rr Ww and Rr ww . What phenotypic ratio is expected from these two parents?

Answers

Answer:

Purple, waxy (R_W_) = 6

Purple, dull (R_ww) = 6

Yellow, waxy (rrW_) = 2

Yellow, dull (rrww) = 2

Phenotypic ratio = 3 (purple, waxy) :3 (purple dull) :1 (yellow waxy) :1 (yellow dull)

Explanation:

This question involves two genes coding for kernel color and kernel appearance or ‘shine in corn plants. The alleles for purple kernel (R) and kernel waxy (W) are dominant over the alleles of yellow color (r) and kernel dull (w).

According to this question, a geneticist cross two corn plants that have the genotype: RrWw and Rrww. The following gametes will be produced by each parent:

RrWw - RW, Rw, rW, and rw

Rrww - Rw, Rw, rw, and rw

Using these gametes in a punnet square (see attached image), the following proportion of offsprings will be produced:

Purple, waxy (R_W_) = 6

Purple, dull (R_ww) = 6

Yellow, waxy (rrW_) = 2

Yellow, dull (rrww) = 2

The phenotypic ratio expected from crossing these two parents is 3 (purple, waxy) :3 (purple dull) :1 (yellow waxy) :1 (yellow dull).

1 point
What chemical compound is responsible for the rotten egg smell that is
typical of seal farts?
Hydrogen disulphide
Hydrogen monoxide
Hydrogen peroxide
Hydrogen chloride

Answers

Answer:

Hydrogen disulfide

Explanation:

Hydrogen disulfide , which is responsible for the rotten-egg scent, is toxic rather than simply smelly, if inhaled at concentrations above 700 parts per million.

It can be present at very low concentrations well below those considered to induce health effects. The scent of sulfide hydrogen does not affect your well-being.

Answer:

Hydrogen monoxide

Explanation:

It is very toxic to smell in farts

what is a condensed structure that contains the DNA that are visible during mitosis?

Answers

Answer:
Chromosomes (two sister chromatid bonded) or Chromatids (separate parts of a chromosome)

what are the functions of chlorophyll?

Answers

Answer:

It helps to capture the light rays that are helpful in the process of photosynthesis

What is the function of spindle fibers during cell division?

Answers

Spindle fibers move the chromosomes during mitosis and meiosis to ensure even chromosome distribution between daughter cells.
I believe spindle fibers moves the organelles around

How is carbon dioxide affecting climate changes? Is there any evidence showing that humans can work on changing the Carbon Dioxide Levels? Can humans control them?


plsss need help!!
ASAP!!!!!!

Answers

Answer:

1.) Carbon Dioxide is being used as a greenhouse, preventing the heat from turning into thermal radiation into space.

11. How can the rate of an infectious disease be drastically reduced?
a By taking medication daily
b. By preventing transmission between people
C. By wearing clean clothes daily
d. By performing dental hygiene three times daily

Answers

Answer:

b

Explanation:

trust trust trust trust

answer should be A , the meds are being taken daily and are meant to fight the infectious disease but B makes sense bc if youre any type of sick, stay home even if jts minor. prevents alot so if someone can help in between those answers maybe ? but i would pick A

What is Lucy? This is for Science they said it’s a gorilla I think I just need confirmation.

Answers

Perhaps the world's most famous early human ancestor, the 3.2-million-year-old ape "Lucy" was the first Australopithecus afarensis skeleton ever found, though her remains are only about 40 percent complete (photo of Lucy's bones). Discovered in 1974 by paleontologist Donald C.

How does the DNA sequence in a normal hemoglobin gene compare to a sickle cell hemoglobin gene?



ASAP

Answers

Answer:A person with normal hemoglobin has inherited one allele for normal hemoglobin from each parent and so has the genotype Hb A/Hb A. In contrast, a person who has sickle disease has inherited one sickle-cell allele from each parent and has the genotype Hb S/Hb S.

Explanation:

The DNA sequence in a normal hemoglobin gene is different from the hemoglobin gene of sickle cell due to a change in nucleotide base from A to T.

What is Sickle cell anemia?

Sickle cell anemia is a group of disorders which cause the red blood cells (RBCs) to become misshapen and break down. It is an inherited group of disorders, in which the red blood cells contort into a sickle shaped cell. The cells die early due to this disorder, leaving a shortage of healthy red blood cells in the blood and can block the blood flow causing pain and crisis.

Symptoms of sickle cell anemia include infections, pain and fatigue.

Genetic studies have shown that the base sequence in the normal hemoglobin (HbA) and the sickle cell hemoglobin (HbS) differs at only a single nucleotide position including a change from an A to a T nucleotide base. This change in nucleotide to one codon results in a single amino acid change in the hemoglobin.

Learn more about Hemoglobin here:

https://brainly.com/question/15011428

#SPJ6

The chemical or molecule that the enzyme is changing or affecting is _____________
activation energy

a substrate

an active site

Answers

Answer:

A substrate

Explanation:

what is a tool that shows phenotypes of genetically related family members

Answers

Answer: A Tool that Shows Phenotypes of Genetically Related family Members, Are A pedigree.

Explanation:

A pedigree is the correct answer.

What is density?

Q1 options:

the amount of salt in water


the amount per unit volume of a particular material


a measure of salinity


the weight of water

Q2 (0.25 points)
As the amount of salt in water increases, the___________ of the water increases.

Question 2 options:

humidity


temperature


size


density

Q 3 (0.25 points)
Deep, cold water is the __________. Warm, shallow water is the ___________.

Question 3 options:

densest; densest


densest; least dense


least dense; least dense


least dense; densest

Question 4 (0.25 points)
Which layer of the ocean is the least dense?

Q4 options:

they are all the same


closest to the ocean floor


closest to the surface


middle layer

Answers

Answer:

Q1: C. salinity Q2: density Q3: B. densest, least dense Q4: C. closest to the surface

Explanation:

Q1: The term "salinity" refers to the concentrations of salts in water or soils.  Q2: when the amount of salt in the water increase which usually gathers mostly at the shallow top of the ocean which is where the warm shallow water gathers, when the warm water has enough salt in it, it sinks to a deeper location causing its density to heighten and that's also what makes it cold.  Q3: When layers form in the ocean, the water containing the most dissolved salt tends to form the bottom layer. The water having the least amount of salt is usually on top, because it is the least dense.  As more solids are dissolved in water, the water becomes more dense.  Q4: Cold water has a higher density than warm water. Water gets colder with depth because cold, salty ocean water sinks to the bottom of the ocean basins below the less dense warmer water near the surface.  I really need brainliest please do so.

Answer:

Here so you can get brainlest :)

Explanation:

Rain falls when the suspended water droplets become too. heavy, dense, hot, cold

Answers

Answer:

heavy

Explanation:

tiustltstsrllsuustrsylrsyrylylsslslylttllysslyslylysr

Answer:

precipitation

Explanation:

Wind is the horizontal movement of air, transporting energy transferred from the earth's surface as sensible and latent heat. Sensible heat is transferred by the processes of conduction and convection. Conduction transfers energy within a substance, and convection transfers energy through the vertical movement of the heated substance. Latent heat is the transfer of energy by transforming the substance itself. As you recall, water has the ability to exist as liquid, gas or solid. The transformation from liquid to gas is called evaporation; the reverse process, from gas to liquid, is called condensation; from liquid to solid is known as solidification (freezing); and from solid to liquid, fusion (melting). Water can also be transformed directly from solid to gas (sublimation), or the reverse, through a process called deposition. We will see these various processes in the formation of clouds.

Clouds are formed when air contains as much water vapor (gas) as it can hold. This is called the saturation point, and it can be reached in two ways. First, moisture accumulates until it reaches the maximum amount the volume of air can hold. The other method reduces the temperature of the moisture filled air, which in turn lowers the amount of moisture it can contain. Saturation, therefore, is reached through evaporation and condensation, respectively. When saturation occurs, moisture becomes visible water droplets in the form of fog and clouds.

PLS answer

How do vaccines generally work?

What is the difference between traditional vaccines and mRNA vaccines?

Answers

Answer:

Vaccines train our immune systems to create proteins that fight disease, known as ‘antibodies’, just as would happen when we are exposed to a disease but – crucially – vaccines work without making us sick

Explanation:

mRNA Vaccines Are New, But Not Unknown

This means the process can be standardized and scaled up, making vaccine development faster than traditional methods of making vaccines. mRNA vaccines have been studied before for flu, Zika, rabies, and cytomegalovirus (CMV).


HELP ASAP!!!


Radiation continues to be detected in the area surrounding the abandoned
nuclear power plant at Chernobyl, which experienced a nuclear accident in
1986. How does this fact illustrate a concern that people have with nuclear
energy as a source of electricity?
O A. It shows that any type of radioactive material will have harmful
effects on organisms in the environment.
O B. It shows that chain reactions are still happening in the reactors at
the nuclear power plant.
O C. It shows that radioactive materials released at nuclear power
plants remain radioactive and persist in the environment.
O D. It shows that nuclear power plants always leak a small amount of
radiation into the environment.

Answers

Answer:

C)

Explanation:

I hope this helps :)

Answer:

its D.

Explanation:

just took quiz

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