How does blood flow from a person's leg
back to the person's
heart?
Blood flows back to
the heart_
_.

Vegetation that grows along the floors of tropical and temperate forests is called undergrowth. how is the undergrowth of a tropical rain forest most likely to differ from the undergrowth of a temperate forest? a. a tropical rain forest's undergrowth most likely experiences periods of dormancy during colder weather. b. a tropical rain forest's undergrowth most likely experiences periods of dormancy during rainy weather. c. the undergrowth of a tropical rain forest most likely requires less sunlight. d. the undergrowth of a tropical rain forest most likely requires more sunlight.

Which part of cellular respiration must occur before any of the other steps can occur

The cretaceous period spanned the time interval between and 65 million years ago. 250 million 144 million 75 million 200 million