Which path through the carbon cycle is possible?

A. plant ® atmosphere ® animal

B. animal ® plant ® atmosphere

C. plant ® animal ® atmosphere

D. atmosphere ® animal ® fossil fuel

4-10 Assuming that the 30-nm chromatin fiber contains about 20 nucleosomes (200 bp/nucleosome) per 50 nm of length, calculate the degree of compaction of DNA associated with this level of chromatin structure.

Why ATP is important to cells

Question from Campbell Biology Chapter 16: 36) Studies of nucleosomes have shown that histones (except H1) exist in each nucleosome as two kinds of tetramers: one of 2 H2A molecules and 2 H2B molecules, and the other as 2 H3 and 2 H4 molecules.

Ecosystems with similar climate and vegetation makeup an _?

When two living organisms do something useful for each other

Which of the following terms have anthropologists used to refer to the observable physical characteristics that distinguish the two kinds of human beings, male and female, needed for human biological reproduction? a. Sex b. Gender c.

Which of the following would happen if cells did not have enzymes? A. Cells would not have any chemical reactions taking place B. Cells would have some chemical reactions, but not enough to support life processes C.

DNA is an incredibly long molecule, and can extend the length of a football field. how can DNA molecule fit inside a nucleus

How do flagellates move

A client's arterial blood gas results reveal a PaO2 of 55 mm Hg. The client's admitting diagnosis is acute respiratory failure secondary to community-acquired pneumonia. What is the nurse's best action?