plant cells are joined by narrow, membrane-lined channels called
What will be an ideal response?
plasmodesmata
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Why are phylogenetic studies of viruses more challenging than Bacteria? Explain how genes are selected in viruses for phylogeny and the constraints those create
What will be an ideal response?
Extremely halophilic Archaea often form ________ in order to access ________
A) stalks / nutrients B) intracellular inclusions / elemental sulfur C) gas vesicles / oxygen D) intracellular membranes / sunlight
Potable water is water that
A. is considered safe to drink because it is completely sterile. B. contains biosensors. C. contains a dangerous number of microorganisms. D. is transferred from one place to another. E. contains low amounts of microorganisms and is considered safe to drink.
A trait with low survival value to the members of a population will most likely
a. undergo a series of mutations in succeeding generations. b. cause the reproductive rate of the individual to increase c. decrease in frequency from one generation to the next d. remain unchanged in frequency through many generations.