Gene flow is the movement of alleles among populations of organisms. it tends to reduce among populations over time. a) fitness b) variation c) conservation d) survival

I'm pretty sure it is B, but don't take my word for it

vascular tissue transports materials from the environment into the plant.

he is very short, and he can only reach halfway up on the elevator buttons. but on a rainy day, he has his umbrella with him, and he uses it to poke the button at the top.