What is the role of compound C? A. a reactant that provides the energy for assembling sugars
О O
B. a reactant that provides the carbon and hydrogen for sugars
O
C. a reactant that provides the carbon and oxygen for sugars
D. a product that forms along with sugars

oxygen = 21% of the atmosphere

nitrogen = 78%

carbon dioxide = 0.1%

argon =0.934%

the answers are as following:

1. c. double helix, nucleosome, coil, supercoil, chromosome

2. b. g2 phase, preparation for mitosis

3. d. interphase consists of the g1, s, and g2 phases

4. c. metaphase

5. a. chromosomes are duplicated before cell division so that each new daughter cell has a complete set