Why would blood volume play a role in the amount of time a mammal can stay under water?

The answer is that they store oxygen in their blood, and in their muscles rather than in their lungs. Marine mammals have a very high blood to body volume ratio. The mammalian diving reflex allows mammals to lower their heart rate and ultimately survive submersion in water for extended periods of time.

Explanation:

b brown mice / white sand dunes

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.