Aquaporins

a. are found in all cells.

b. allow water to cross the plasma membrane against its concentration gradient.

c. allow for the active transport of water.

d. allow water to cross the plasma membrane via facilitated diffusion

Who made the subject biology?

What are the three types of mines

What difficulties are encountered in studying living cells of multicellular organisms?

Which of the flowing is a benifit that many flowerinf plants get from animals

How does your body grow as you get older? Your cells fill with water, and get bigger. Your cells divide, producing new cells. Your cells elongate. Your cells combine with one another.

Which body system is correctly paired with its function? A) excretory-produces antibodies to fight disease-causing organisms B) digestive-produces hormones for storage and insulation C) circulatory-transports materials for energy release in body

Which is an example of reverse polarity? a. Earth's magnetic field lines up in the same direction as the present magnetic field. b. The south magnetic pole lines up with the present south magnetic pole. c.

Determine the type of microscope which can only be used to view non-living specimens.

What is the genus of the popular fossils which are similar to "lucy"?

The parasympathetic division of the autonomic nervous system A. is associated with "fight or flight." B. opposes the effects of the sympathetic division. C. arises from parts of the spinal cord. D. uses the neurotransmitter norepinephrine.