The provides oxygen and nutrients to the growing fetus and removes waste products from its blood. it attaches to the wall of the uterus and the umbilical cord arises from it.

Which of the following examples can cause gene flow between populations? a.an increase in predators to a population of zebra b.a volcanic eruption that kills half of a population of mice c.bird droppings that contain seeds from a different location d.a person that sprays a toxin on a group of mosquitoes

What are charcteristics of lithosphere?

In the diagram below, the northern hemisphere would be in what season at position a a.fall b. winter c.summer d.spring