How do viruses gain entry into cells?
What will be an ideal response?
Bacterial viruses poke holes in the sides of bacterial cells and inject their DNA inside. Plant viruses enter in tiny tears on the surfaces of plant cells. Animal viruses enter animal cells by endocytosis.
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Atmospheric O2 is a waste product of photosynthesis
a. True b. False
One disadvantage of a simulation model of an ecosystem is that it
a. does not take into effect interactions between organisms. b. does not take into effect nutrient availability. c. does not take into effect water availability. d. may not be accurate. e. may predict disastrous consequences.
Sclereids are cells that:a
are found in wood and bark. b. conduct water and dissolved minerals. c. are usually found in nut shells and pits of stone fruits. d. conduct dissolved sugars. e. form cytoplasmic connections between cells.
Lamarck's hypothesis that traits acquired during the lifetime of an individual are passed on to progeny:
a. was interesting, reasonable, and based on an idea that was universally accepted by scientists and nonscientists alike. b. connected evolutionary change to environmental fit. c. Both of the above. d. None of the above.