Maxillae are used to bite and grind food
____________________ Indicate whether the statement is true or false.
False - Mandibles
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A cell biologist is studying how toxins damage cells and prevent the transfer of signals from
outside to inside the cell. Which cell component is he studying?
a. plasma membrane b. cytoplasm c. ribosomes d. mitochondria
Phototropins repress transcription of a gene that causes auxin efflux carriers to be distributed evenly around the cell. What happens next, when phototropins are released as a response to a plant cell being exposed to a directional light source?
a. Auxin efflux carriers become positioned on the sunny side of the plant. b. Auxin efflux carriers become positioned on the shady side of the plant. c. Auxin buildup occurs within the cells, but in no set pattern. d. Auxin efflux carriers become positioned on the shady side of the plant and the plant bends towards the light. e. Auxin efflux carriers become positioned on the sunny side of the plant and the plant bends towards the shade.
The hallmark feature of peroxisomal diseases is the accumulation of
A) hydrolases. B) very long chain fatty acids. C) peroxidases. D) ATP. E) pigments.
Measurements of bill length in a population of seed-eating birds reveals two distinct groups: small-billed individuals feeding on soft-shelled seeds and large-billed individuals feeding on hard-shelled seeds
This bimodal distribution most likely resulted from A) stabilizing selection. B) natural selection. C) directional selection. D) disruptive selection.