The survival of plants depends on
A. Sunlight, water, and organic materials
B. Water, minerals, and organic materials
C. Water, minerals, and sunlight
D. Water, oxygen, and sunlight
Answer: C. Water, minerals, and sunlight
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During which phases of mitosis are chromosomes composed of two sister chromatids?
a. prophase only b. prophase and metaphase c. prophase and anaphase d. anaphase and telophase e. chromosomes are composed of two sister chromatids during all phases of mitosis
During implantation, the __________ buries itself in the uterine wall. Fill in the blank(s) with the appropriate word(s)
What causes the furrow during cleavage?
A) It is a depression caused by the formation of a new cell wall. B) A ring of contractile protein fibers pinches the cell in two. C) Connecting proteins that had been binding adjacent cells together now dissolve. D) A loss of water occurs.
Maintaining a constant cell population in a chemostat requires the monitoring and control of
a. nutrient concentrations. b. the dilution rate of volume pumped in. c. the population's waste products. d. all of the above.