In the DNA molecule, hydrogen bonds form between _____.
A) sugar and phosphate groups
B) base pairs
C) the nitrogen base and sugar groups
D) phosphate groups and the nitrogen base
Answer: B) base pairs
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Cnidarians are
A. aquatic animals. B. Both land-dwelling animals and aquatic animals are correct. C. land-dwelling animals. D. arboreal animals. E. Both land-dwelling animals and arboreal animals are correct.
In the experiment with peacock butterflies, the working hypothesis is that
a. silence confuses both predator and prey. b. making sounds can provide a selective advantage to the prey. c. birds are capable of learning. d. birds are agents of evolution. e. unpalatable species display distinctive wings.
Vast __________ form in the interior of midlatitude
continents. Fill in the blank(s) with the appropriate word(s).
Which bacteria have been found in 10% of powdered infant formula and have been linked to several fatal outbreaks of meningitis in children's hospitals?
A) Bacillus cereus B) Clostridium botulinum C) Enterobacter sakazakii D) Listeria monocytogenes