13.

Matings between individuals from the two populations of Rhagoletis produce hybrid flies that appear to be healthy and have norma

Mama L [17]

<h2>The correct answer is : C.</h2>

Explanation:

According to the question, mating between two populations of Rhagoletis produce hybrid flies.
This means that the two population is present in the same habitat or locality, hence they are capable of coming in contact with each other and mate. Hence, the answer cannot be Habitat Isolation.
Mating produces hybrid flies. This is possible when the gametes (egg and sperm) of the two different populations are capable of capable of coming close to each other and undergoing fusion (fertilization). Hence, there is no Mechanical Isolation.
The zygote formed by the above fertilization is capable of developing into healthy hybrid flies with normal life span. Hence, Pre-zygotic Isolation is absent.
But the hybrid flies formed are sterile and not fertile, that is, they are incapable of producing viable gametes which can undergo fertilization and produce a new offspring.Therefore, the eggs laid by the hybrid flies hatch less often. Hence, there is existence of Reduced hybrid fertility.

8 0

3 years ago

If a muscle contracts isometrically for a long period of time, an EMG (which records the electrical activity in the muscle) reco

oksian1 [2.3K]

Answer:

During the course of a continuous isometric contraction of given strength, the electrical activity progressively increases. This is due to recruitment of motor units taking place to compensate the decrease in force of contraction occurring in the fatigued muscle fibres.

Explanation:

5 0

3 years ago

Polysaccharides are simple sugars. is it true or false

kari74 [83]

True is the correct answer

6 0

3 years ago

Read 2 more answers

Which plant adaptation would likely be found in taiga

IrinaK [193]

Many trees are evergreen so that plants can photosynthesize right away when temperature rise, many trees that have needle-like leaves which shape losses less water and sheds snow more easily than broad leaves waxy coating on needle-like prevent evaporation need-like leaves are dark in color allowing solar heat to absorbed many trees have branches that droop downward to help shed excess snow to keep the branches from breaking.

4 0

3 years ago

Read 2 more answers

As the kidneys filter blood, it is necessary for both fluid and dissolved chemicals in the plasma to be rapidly removed without

ioda

Answer:

Here are the options to complete the question

A. Fenestrated capillaries

B. continuous capillaries

C. sinusoids

D. anastomoses

A. Fenestrated capillaries is our Sure ANSWER

Explanation:

Fenestrated capillaries (is located wherever active capillary absorption or filtration occurs)

The renal glomerulus - a network of capillaries - can be identified as fenestrated capillaries aiding the diffusion of small molecules and small amount of protein into the blood stream.

6 0

3 years ago