Rickettsias and chlamydias are classified as
A) Gram-positive bacteria.
B) extracellular parasites.
C) obligate intracellular parasites.
D) hyperthermophiles.
Ans: C) obligate intracellular parasites.
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Haploinsufficiency ____
a. produces Barr bodies
b. results from elevated gene dosage c. occurs when a diploid organism has only one functional copy of a gene d. occurs due to gene duplication e. refers to the loss of a whole set of chromosomes
Four of the five features listed below are
characteristic of eudicots. Select the exception. a. secondary growth b. net venation c. flower parts in fours or fives d. two seed leaves e. pollen grains with one pore or furrow
What biogeographic patterns are likely to have played the most prominent role in diversification of ancestral mammalian lineages?
A. Proliferation of grasslands during the Cenozoic era B. Convergent evolution following loss of land bridges during the Cenozoic era C. New opportunities from loss of other vertebrates in the sixth mass extinction event during the Cenozoic era D. Fission and fusion events in plate tectonics during the Mesozoic era
Identify the labeled structures of the respiratory system in the diagram.
A:________B:________C:________D:________E:________F:________G.________H:________I:________
What will be an ideal response?