What is the sac that must surround something before it can be actively transported across a membrane? A. Centrosome B. Chloroplast C. Ribosome D. Vesicle

Greg is telling his teacher how a cell is like a house. Which part of a cell is like the air in Greg's house? Cell membrane Cell wall Cytoplasm Vacuole

Is melting, freezing, vaporization, and condensation gain or loss in movement of particles?

What is the difference between embryonic stem cells and adult cells?

the slowest type of mass movement, which involves the lifting and contracting of soil particles over time, is called

What percentage of fungi uses photosynthesis to make their own food? 0%, 15%, 50%, or 100%

Suppose you are investigating how the diet of hamsters affects how much they run on their hamster wheel. In order to control the experiment, which of these should you do? A. Change only the diet of each hamster. B.

Which is an example of population density? a. country with a large population b. a maximum number of wolves in a forest c. the total number of alligators in Florida d. two jaguars per thousand hectares

In what ways do you think a virus can access your body?

What is a DNAfingerprint used for

What did schleiden and schwann conclude about cells?