Fruit flies are commonly used in genetic investigations that focus on traits passed from parents to offspring over several generations. what can you infer is there reason fruit flies are the most commonly used organism for this type of investigation?

The fruit fly also known as Drosophila melanogaster is a well understood of all the model organisms.

Drosophila is a giant of scientific research used to study genetics and development as:

1. Small size of fruit fly (3 mm long) has allowed scientists to keep them  in laboratory in large numbers.

2. They are easy to maintain in the laboratory as they require a simple diet carbohydrates and yeast extract.

3. Short and simple reproduction cycle of  8-14 days so large number of offspring can be seen in small duration.

4. Relationship of fruit fly genes to human genes like 75 per cent of the disease causing genes are similar.

5. Fruit fly genes are easy to mutate so a large number of mutations in their traits can be studied.

6. Their polytene chromosomes allows easy study of chromosomal rearrangements and deletions.

7. In production of transgenic animals.

Thus, study of the fruit fly genes plays significant role in genetics.

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.

the framers of the constitution insisted that federal judges be nominated instead of elected due to their desire to have judges above the shifting whims of the masses.

the hope, whether achieved or not, was that federal judges would only be beholden to the law and that by not having judges be elected, they would be protected if that law dictated an outcome that ran counter to popular opinion.