How long can water remain stored in a confined aquifer? millennia
a few days
more than a million years
several years

its more than a million years i took the test and got it right

Explanation:

both male and female gametes are produced by meiosis of the germ cells. therefore, both male and female gametes are haploid. one male and one female gamete unite during the fertilization to form the diploid zygote. in seed bearing plants, pollen grain is the male gametophyte, which produces sperm cells.

the endomembrane system i think