CO2 enters and O2 escapes from a leaf via.

A) stomata.

B) grana.

C) thylakoids.

D) stroma.

What is the largest level of biological study?

What part of the brain goes through dramatic development in middle childhood, and what behavioral functions improve as a result? A. Cerebellum, vision and facial recognition B. Frontal lobe, cognitive flexibility, reasoning C.

How does a sand dollar demonstrate the 8 characteristics of life (homeostasis, energy, reproduction, DNA, growth, evolution, response to environment, and cells) ?

Which statements describe the planets? Check all that apply.

Why is the primary structure fundamental to protein function?

What is likely the greatest cause of species extinctions this century

What is an ecological system consisting of all of its biotic and abiotic factors? A) community B) ecosystem C) habitat D) pure culture

What will most likely happen if a species can no longer produce offspring?

Justine scraped her arm. She started bleeding and it would not form a scab and stop bleeding. Which is most likely her genotype? XHXh XhXh XHY XhY

The two processes that determine the world's current biodiversity are