During plant cell cytokinesis, what is the name of the structure that forms between the daughter cell nuclei and eventually will become the new cell wall?
A) Constriction ring B) Kinetochore C) Cell plate D) Vesicle wall
C
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Without the higher rates of transpiration exhibited by angiosperms:
A. many tropical regions would have higher temperatures and lower rainfall. B. many tropical regions would have lower temperatures and lower rainfall. C. many tropical regions would have lower temperatures and lower rainfall. D. many tropical regions would be deserts.
The biofilm that forms in your shower ("shower curtain scum") can tolerate exposure to hot water when you shower and is resistant to desiccation between showers. The microbes in the biofilm are not endospores, so what is the best explanation for their survival under these conditions?
A. Although some microbes will be killed, those embedded deeply within the biofilm are protected from environmental challenges. B. Biofilms are composed of diverse microbes, and within each biofilm, there are certain to be endospore-formers and thermophiles. C. Dead skin cells continuously replenish the biofilm, and organic soaps provide a continuous carbon source. D. The shower hasn't been thoroughly cleaned in a while, and when I really scrub it, the microbes will all be killed.
The eukaryotic organelle that is directly involved in the transport of proteins synthesized on the surface of the rough ER is called the:
A. smooth ER. B. vacuole. C. mitochondrion. D. Golgi body. E. nucleus.
The weakest symbiotic attachment, in which one species simply lives better in the presence of another species that is relatively unaffected is called:
a. commensalism b. competitive exclusion c. mutualism d. predation e. parasitism