In plants the fertilized egg develops into a multicellular __________ (young plant) within a female
gametangium.
a. zygote
b. seed
c. embryo
d. endosperm
e. cotyledon
C
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Mannitol salt agar (MSA) only allows the growth of halophiles (salt-loving microbes); nonhalophiles will not grow. Among the halophiles, mannitol fermenters will produce acid that turns the pH indicator yellow; mannitol nonfermenters leave the medium red. Onto MSA you inoculate a halophilic mannitol fermenter and a halophilic mannitol nonfermenter. In this case, the medium is acting as (a) ________ medium(s).
A. enrichment B. differential C. selective and differential D. selective
In the female reproductive cycle, the endometrium is thickest
a. during the menstrual phase. b. during the proliferative phase. c. shortly before ovulation. d. during ovulation. e. in the secretory phase.E
Many poisonous snakes share warning colors of red, yellow, and black. This is an example of:
a. Batesian mimicry. b. mutualism. c. camouflage.
d. Müllerian mimicry. e. character displacement.
What part of the DNA replication process would be most directly affected if a strain of bacteria lacking primase were used to make the cell extracts?
(a) initiation of DNA synthesis (b) Okazaki fragment synthesis (c) leading-strand elongation (d) lagging-strand completion