The negative subatomic particle is the ____
a. neutron
b. proton
c. electron
d. quark
e. Higg's boson
ANSWER: c
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Scientists have discovered that when they provide supplemental food for hares, their density tripled. The figure above shows cycles of lynx and hare populations over a century's time. What do you predict would happen to the lynx and hare populations in an area where hares were provided supplemental food for one year?
A. The lynx population and the hare population would increase simultaneously, and stay at a stable high level permanently.
B. The hare population would increase, but the lynx population would be unaffected.
C. The lynx population would decrease as hares increased due to exploitative competition, then slowly rise back to the original level.
D. The lynx population would increase 1-2 years after the hares increased, then both would continue cycling down and up.
Compounds are formed when
a. atoms of an element lose an electron. b. atoms of an element gain an electron. c. atoms of the same element join together. d. atoms of two different elements join together.
Which of the following is not a type of microRNA?
A. Antisense RNA B. tRNA C. Riboswitch D. miRNA E. siRNA
The progression from metaphase to anaphase is triggered by
a. activation of protein kinases by MPF. b. ubiquitin-mediated proteolysis of key proteins. c. binding of an inhibitory protein to MPF. d. depolymerization of the mitotic spindle.