A growing plant is shown below. Which of the following is a plant’s response to gravity that causes the roots to go down and the shoots to grow up?

A. Phototropism.
B. Geotropism
C. Hydrotropism
D. Thigmotropism

Animal bodies (and even plant bodies for that matter) are complex enough that life couldn't exist without enzymes. enzymes are usually large, complex biological catalysts that are expensive to make. enzymes speed up the rate of chemical reactions without being used up during the reaction (they can be reused many times). they are highly specific in the reactions they regulate. knowing what enzymes are and how they function, why does this explain why complex life forms could not exist if there were no enzymes.

Need will mark ! which features are created by groundwater erosion and deposition? check all that apply. a. stalagmitesb. sinkholesc. rillsd. stalactites e. gullies f. rivers

As a small change in a person's dna can cause a genetic disorder