Rotifers take their name from
a. their tumbling movements through the
water.
b. actions of cilia on their head.
c. their radial symmetry.
d. their elaborate digestive system.
e. rotational action around the central body
axis
B
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The bacterial Shine-Dalgarno mRNA sequence is specifically recognized by:
A. protein S5 of the 30S subunit. B. N-formylmethionyl-tRNAfMet. C. the 23S rRNA of the 50S subunit. D. the 16S rRNA of the 30S subunit.
In the case of John Moore, whose excised spleen was used by UCLA researchers to establish patented cells lines and ultimately commercially valuable products, the California Supreme Court ruled in 1990 that _____
a. patients are entitled to property rights over cells or tissues removed from the body and used to develop commercial products b. patients do not have property rights over cells or tissues removed from the body and used to develop commercial products c. human cells and cell lines cannot be patented d. organ donors cannot be compensated from the sale of human tissue e. recombinant DNA technology is harmful
Your professor brings in a soybean plant that he uprooted from nearby. Small growths on the roots are stained to show bacteria. Your professor explains the bacteria can "fix" nitrogen into a usable form for the plant. The growths are called
A. root hairs. B. nodes. C. sieve tubes. D. nodules. E. internodes.
Many of the organic molecules associated with life can be created spontaneously under certain conditions. What do these conditions resemble?
A) Earth's core B) Primordial Earth C) The sun D) A comet