Although not yet aware of her pregnancy mrs. upton has conceived a single cell from the union of an egg cell and a sperm cell. this single cell is called a(n):

The asian shore crab (hemigrapsus sanguineus) is an invasive species that has impacted the atlantic coast. predict what characteristic of this invader would most likely disrupt the biodiversity of this area.

Which of the following can occur to two segments of a population if they are geographically isolated 1.) they can only share some types of genes 2.)both groups most likely become extinct 3.)they find a way to come back together 4.)eventually they become separate species

Which characteristics must an object possess in order to be considered alive?