Which of the following is an example of a niche?

a.

a squirrel living in a tree.

b.

a fish in a pond.

c.

a lion hunting for zebra in a grassland.

d.

two birds flying in the air.

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.

i believe it would cause an increase of percipitation, though i could be wrong. so i would say b is the answer.