What is a dissaccharide
a. glucose
b. fructose
c. sucrose
d. cellulose?

Which of the following is a main difference in cell structure between an onion cell and a human cheek cell? a. an onion cell contains one nucleus, whereas a human cheek cell contains two nuclei. b. an onion cell has a cell wall. c. a human cheek cell contains chloroplasts. d. there is no difference between an onion cell and a human cheek cell. you for your.

The law of thermodynamics states that energy can't be created or destroyed. to natural sources of energy on earth are the

Approximately how many times does an average human heart beat in a lifetime?