Which structure in the figure below is commonly injured by people inserting cotton swads or other objects into their ears?

a) structure d

b) structure a

c) structure c

d) structure b

The Answer is A) structure D

Explanation:

The structure that is commonly injured is the ear drum and that is identified by the letter D.

the correct answer is:

a population changes in response to a change in the environment.

the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.