Answer:
well what do you feal are corect i cant choose for you but i can help
Explanation:
For an animal to be extinct none more of that specific species must exist on Earth. This makes it impossible for that species to come back to life.
In normal humans, sex cells contain the haploid number of chromosomes.
To be pregnant, an equilibrium in ph and chemical contents of the uterus and the outside environment has to be maintained, to prevent any reactions of the chemical sustances taken in by the person pregnant and the baby *has something to do with concentration gradient, hence yes, pregnancy can count as homeostasis