Why does an animal exhale? A) To get rid of cellular waste like oxygen from the body.
B) So cells can use the oxygen in the air to produce energy.
C) To get rid of cellular waste like carbon dioxide from the body.
D) So cells can use the carbon dioxide in the air to produce energy.

Explanation:

Your cells are precious. You have enough variables to manage without having to worry about whether you’re maintaining proper temperature at every stage of the cell culture process.

That’s why we created this comprehensive guide to help you successfully freeze animal cells and manage a cell repository.

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.