Cell differentiation refers to:

a) cell organelles with different structure

b) all the functions inside a cell

c) the difference between plant cells and animal cells

d) different functions inside an organism

Do all autotrophs use the sun as an energy source

Where is gastrin produced, and what stimulates its production?

A turgid plant cell would be found in which type of environment? A) arid B) isotonic C) hypotonic D) hypertonic

True or False: Changes in an organism can't occur because of an outside force, such as a massive earthquake.

If you want your crops to grow larger than they normally would you may want to try adding

How are organisms grouped in an ecosystem? a. by their movement b. by how they get their energy c. by how they migrate d. by how they produce

What happens to about 10 percent of the energy represented in each trophic level?

Is a lion is a carnivore?

How does the biological species concept define a species?

What do the skin and urinary system have in common? Both remove filtered wastes and reabsorb blood. Both remove undigested food from the body. Both remove urine from the body. Both remove urea from the body.