The breakdown of hydrogen peroxide, a toxic substance, occurs in small, specialized membrane-bound organelles
called ____.
a. lysosomes
b. peroxisomes
c. glyoxysomes
d. glycosomes
e. cisternae
ANSWER: b
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Plants exude ____ from roots to stimulate the growth of soil fungi
a. strigolactones b. cytokinins c. ethylene d. auxins e. jasmonates
Plants and algae most recently shared a common ancestor 480 million years ago, and plants colonized land shortly after that. In sexual reproduction, an alga simply releases gametes into the water, and the current carries the sex cells to another individual. What adaptation arose in gymnosperms and angiosperms that allowed reproduction on dry land and over great distances?
A. development of stomata B. production of lignin C. development of vascular tissue D. production of pollen E. production of a cuticle
HIV contains ____ as its genetic material
a. single stranded DNA b. double stranded DNA c. double stranded RNA d. single stranded RNA e. both DNA and RNA
The experiments by Hershey and Chase helped confirm that DNA was the hereditary material on the basis of the finding that:
a. Radioactive phage were found in the pellet b. Radioactive cells were found in the supernatant c. Radioactive sulfur was found inside the cell d. Radioactive phosphorus was found inside the cell