Openings on the underside of leaves that function in the exchange of gases are called

A. stomata.

B. sori.

C. guard cells.

D. cuticles.

Is the volume of air that can be moved into or out of the lungs during eupnea?

With independent assortment, the ratio of phenotypes in the F2 generation of a cross between true-breeding strains (AA bb x aa BB) can be described as 9:3:3:1 when A and B are dominant over a and b. To what phenotype does the "9" in the ratio refer?

What has to happen for something that is not science to become accepted as science

A plant with yellow flowers was crossed with a plant with red flowers. all of the numerous offspring had red flowers. what does this show about the genotype of the parental plant with yellow flowers?

A stage of mitosis in which the chromosomes condense and become visible

Which statement best describes the process of chemiosmosis and the direct result of its occurrence? A. The choices are Hydrogen ions flow from the thylakoid down a concentration gradient through ATP synthase channels into the stroma.

Describe how human activities threaten polar bears in the arctic

What did Mendel cross pollination of pea plants prove

Which type of rock is created when lava cools and hardens? A. igneous B. sedimentary C. metamorphic D. cement

Name 2 ways the diffusion of popular customs can adversely affect the environment