According to the theory of evolution by natural selection, which of these statements is correct?

Alex17521 [72]

Answer:

Explanation:

Soils provide plants with essential minerals and nutrients. Soils provide air for gaseous exchange between roots and atmosphere. Soils protect plants from erosion and other destructive physical, biological and chemical activity. Soils hold water (moisture) and maintain adequate aeration. And conspiracy theorist astronaut dose not believe that the moon or air exists lol hope this helps

8 0

3 years ago

PLEASE HELP ASAP!!!!!!!! BEST ANSWER GETS BRAINLIEST!!!!!!!!!!

Daniel [21]

Three examples would be gamma rays (usually these rays are emitted from unstable isotopes and can be used in nuclear experiments and testing) ultraviolent rays that are emitted from the sun and can cause sunburn and even skin cancer because the rays mutate the DNA in the skin cells nucleus. And also X-Rays, microwaves, and radio waves, which is usually harmless because it isn’t enough radiation to mutate DNA in our cells

I hope this is what you wanted

4 0

3 years ago

In the world of purple people eaters, one eye (E) and one horn (H) are dominant traits. Purple people eaters

Tju [1.3M]

Answer:

3

Explanation:

Male ; EeHh

Female ; EeHh

Then,

possible gametes for each = EH / Eh / eH / eh

where,

EH Eh eH eh

EH EEHH EEHh EeHH EeHh

One eye One eye One eye One eye

One horn One horn One horn One horn

Eh EEHh EEhh EeHh Eehh

One eye One eye One eye One eye

One horn Two horn One horn Two horn

eH EeHH EeHh eeHH eeHh

One eye One eye Two eye Two eye

One horn One horn One horn One horn

eh EeHh Eehh eeHh eehh

One eye  One eye  Two eye  Two eye 

One horn Two horn  One horn Two horn 

Therefore,

One eye, one horn:One eye, two horn:Two eye, one horn:Two eye,two horn

is,

9 : 3 : 3 : 1

This ration proves that the above working is correct and is dihybrid cross.

6 0

3 years ago

A malaria outbreak causing allele frequencies to change is an example of

Nina [5.8K]

This would be an example of a mutation, because the changing of allele frequencies would be a change within the gene itself, which would be a mutation in the DNA. This is evidenced by the fact that there is now a form of human resistance to malaria, due to changes within human DNA itself.

6 0

3 years ago

An age pyramid with a broad base that quickly slopes up to a narrow top would be indicative of ________.

kiruha [24]

Answer:

A. a developing nation

Explanation:

Age pyramids are the age structure diagrams that represent the number and proportion of people at each age in a population. The base of the age pyramids represents the population in pre-reproductive age which is from 0 to 10 years. The overall shape of an age pyramid indicates if the population is increasing, stationary, or shrinking.

The age structure diagram for a developing nation has a broad base that tapers quickly towards the top. This means that a larger percentage of the population is in the pre-reproductive age group and reproductive age group with a smaller percentage of the population in the post-reproductive age. These countries have a great chance of future population growth.

3 0

3 years ago