Honeybees convey information to other worker bees
in the hive about all EXCEPT the __________ of a
food source.
a. direction
b. general location
c. distance
d. abundance
e. angle relative to the sun
Answer: d
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Why do positively charged amino acids appear more often than usual in histone proteins?
A. Because histones have a higher molecular mass, which improves DNA compaction B. Because histones are strongly attracted to the positively charged phosphate backbone of DNA C. Because histones and DNA have opposite charges, which improves the compaction of DNA into nucleosomes D. Because histones and DNA have the same charge, which improves the compaction of DNA into nucleosomes
What organism is at the first trophic level in a tallgrass prairie ecosystem?
a. birds b. grasshoppers c. grasses d. decomposers e. parasites
The kidneys receive about __________ percent of
the cardiac output at rest. a. 5 b. 9 c. 13 d. 15 e. 20
Which factor has so far kept gene therapy from becoming an effective treatment for genetic disorders?
A.) the difficulty of getting new genes to become part of a cell's DNA B.) the complexity of sequencing the entire human genome c.) the lack of success in finding genes that are responsible for genetic disorders D.) the ethical questions about making transgenic humans