There are two separate populations of manatees in within the…

There are two separate populations of manatees in within the Gulf of Mexico. The females in one population are only receptive to mating in September; the females in the other population are only receptive to mating in August.   These events could result in isolation.

Whether it enters an animal’s cells directly from the enviro…

Whether it enters an animal’s cells directly from the environment, enters blood through gills (like in the molly), or enters blood through lungs (like the manatee, alligator, or giraffe), oxygen gas always moves by the process of _____, following its partial pressure gradient.