The protozoan Didinium feeds on other organisms by engulfing them. Why are bacteria, in general, unable to feed on other cells in this way?
What will be an ideal response?
Didinium engulfs prey by changing its shape, and for this it uses its cytoskeleton. Bacteria have no cytoskeleton and cannot easily change their shape because they are generally surrounded by a tough cell wall.
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Many hyperthermophiles are chemolithoautotrophs
Indicate whether the statement is true or false.
Which chromatin remodeling complexes increase transcription and include an ATPase subunit?
A. bromodomain proteins B. chromodomain proteins C. chaperone proteins D. both bromodomain and chromodomain proteins
Instinctive behaviors are distinguished from learned behaviors because instinctive behaviors are ____
while learned behaviors are ____.
a. genetically programmed responses; dependent upon experience b. dependent upon experience; genetically programmed responses c. acquired from observation; acquired from practice d. incomplete the first few times they are displayed; apparently a product of reason e. taught by parents; acquired from trial and error
The length of daylight affects flowering, a process called
A. photoperiodism. B. gravitropism. C. thigmotropism. D. phototropism.