The individual credited with the initial description of endospores (as being highly heat resistant microbes) is
A) Robert Koch.
B) John Tyndall.
C) Louis Pasteur.
D) Carl von Linnaeus.
Ans: B) John Tyndall.
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In addition to electrons, which of the following is also involved in electron transfer?
A. Glucose B. Hydrogen C. ADP D. Carbon E. Carbon dioxide
One way to kill a tree is to girdle it by cutting a groove a centimeter into the bark all around the trunk of the tree. The tree will typically survive that growing season, but will die over the winter. Why wouldn't girdling work on a large grass?
A. Monocots do not have vascular bundles. B. Eudicots do not have vascular bundles. C. Grasses have taproots. D. The vascular bundles are scattered throughout the ground tissue. E. The vascular bundles are in a ring just under the bark.
The tissue containing nerves, blood, and lymph vessels in teeth is known as the:a
dentin. b. cementum. c. enamel. d. tooth socket. e. pulp cavity
Which of the following statements accurately describes why Taq polymerase is used in PCR?
A. It has regions that are complementary to the primers. B. It is heat stable and can withstand the heating step of PCR. C. It binds more readily than other polymerases to the primers. D. Only minute amounts are needed for each cycle of PCR.