Which process can move molecules from a lower concentration on one side of the membrane to a higher concentration solution on the other side?

Plants get their energy from OA. the Sun OB. rocks OC. the wind OD. the soil

Which of the following trace fossils is actually fossilized excrement

Specialized sex cells, such as eggs and sperm, are called: a. gametes c. gonads b. diploids d. chromosomes

A cell has enough available atp to meet its needs for about 30 seconds. What is likely to happen when an athlete exhausts his or her atp supply?

House sparrows in the northern part of North America are larger than those found in the southern regions. Which mechanism of microevolution is more likely to be responsible for this? A.) founders effect B.) natural selection C.) genetic drift

Which is an example of commensalism in the tropical rainforest? a. parasites feed on the sloth's body. b. sloths are food for other animals. c. algae live in a sloth's fur, providing it with camouflage. d. insects lay eggs in the sloth's waste.

Why do you think the caterpillar is colored green?

A punnet square predicts a 9:3:3:1 ratio for phenotypes. Explain what that ratio means ...

What is the meaning of virus?

A 6-year-old boy has marked edema of the legs, accumulation of fluid in the abdomen, and a low blood serum albumin and total serum protein. his urine contains large amounts of protein. what is the most likely cause of edema?