CO2 enters and O2 escapes from a leaf via.

A) stomata.

B) grana.

C) thylakoids.

D) stroma.

How does the digestive system convert food into nutrients and energy?

In meiosis two, cytokinesis results in the production of

When both water and salt are present in a solution and teh cell needs water, which process enables the cell to obtain the water without the salt - osmosis through a permeable membrane - diffusion through a permeable membrane - osmosis throuhg a

Which one of the following is not a common source of phospholipids? A. egg yolks B. egg whites C. soybeans D. peanuts

The term used to describe the dry mass of living or once living organisms per unit area is

Sort the bones based on whether they belong to the appendicular skeleton or the axial skeleton.

Abnormally low levels of the neurotransmitter serotonin are associated with:

You are in a body of water where freshwater flows into the ocean. Which ecosystem is this?

Most of cellular respiration take place in what

An ocean trench forms when?