The leading cause of human death around the

world is



a. heart disease.
b. cancer.
c. malnutrition and starvation.
d. war.
e. accidents


C

Biology & Microbiology

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The binding of one O2 to hemoglobin makes it easier for additional O2 to bind

A. true B. false

Biology & Microbiology

14C is heavier than 12C because it has ____

a. two more electrons than 12C b. two more neutrons than 12C c. two more protons than 12C d. two more protons and two more electrons than 12C e. one more proton and one more neutron than 12C

Biology & Microbiology

The male gametophyte becomes

a. ovules. b. seeds. c. pollen grains. d. cones. e. sperm cells.

Biology & Microbiology

In Figure 3-2, ionic bonds would form between the R groups of which amino acids?

a. 1 and 3 b. 2 and 4 c. 3 and 5 d. 4 and 6 e. 3 and 6

Biology & Microbiology