The study of the world-wide distribution of plants and animals is ____
a. fossilization
b. fossilization dating
c. biogeography
d. plate tectonics
e. radiometric dating
ANSWER: c
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A researcher synthesizes a new drug that specifically targets and degrades peptidoglycan. What type of infections could this drug treat? (Select all correct choices.)
A. infections caused by archaea B. infections caused by bacteria C. infections caused by viruses D. infections caused by eukaryotes
Which of the following is true of purines?
A) Cytosine is a purine. B) Adenine's bonding to thymine is stronger than is guanine's to cytosine. C) Purines have a double-ringed structure. D) Both adenine and thymine are purines. E) Purines bind readily to deoxyribose but not to ribose.
What type of an extracellular matrix does blood have?
a. gel-like b. matrix hardened by calcium and phosphorus c. fluid d. glycoprotein rich e. tightly packed with fibres
Oxygen and carbon dioxide move across a cell membrane by the process of active transport
a. true b. false