Which layer of soil is least likely to be penetrated by plant roots?

a.

O (organic matter)

b.

A (topsoil)

c.

B (subsoil)

d.

C (parent rock)

Which group includes the simplest of organisms that do not have a nucleus? a. bacteria b. archaea c. protista d. archae and bacteria e. fungi?

True or false Heterotrophs convert solar energy into chemical energy.

4. What happens to nitrogen inside of a plant?

What kinds of plants established themselves early on Surtsey Island?

In the novel The Joy Luck Club, author Amy Tan examines degrees of ___ among traditional Chinese mothers and their Americanized daughters. A. assimilation B. evocation C. redolence D. resonance

Above 38oC and below 0oC the rate of photosynthesis decreases. Propose a hypothesis to explain why this occurs.

Corn kernels have an outer endosperm and an inner endosperm. A purple outer endosperm is dominant to a colorless (clear) outer endosperm. A yellow inner endosperm is dominant to a white inner endosperm.

What are mitochondria and how do they function?

What is the blood type of the unknown parent

What membrane do gases move most efficiently on