Cells in the G2 stage of the cell cycle have ________ as cells of the same species in the G1 stage.
A) twice as many crossovers
B) twice as many chromatids
C) half as many chromatids
D) the same number of chromatids
E) half as many chromosomes
B) twice as many chromatids
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During primary growth, auxin causes young cells to expand by increasing the activity of __________ that pump
hydrogen ions from cytoplasm into the cell wall. Fill in the blank(s) with the appropriate word(s).
Which of the following statements is NOT true of the
human female? a. She produces all the eggs that she ever will before she is born. b. The process of meiosis may take 30 to 50 years to complete. c. The primary oocytes lay dormant until puberty. d. She will normally produce more gametes than her male counterpart. e. It is possible that more than one egg will be released at ovulation.
Because of the high pressure and cold temperatures, few species of organisms survive in the deep benthic zone of the ocean
Indicate whether the statement is true or false
File this one under "confusing plant terminology." Both a plant's stoma and its stroma are important in photosynthesis. What's the difference between stoma and stroma?
a) Stoma is the singular of stomata, the gas exchange pores in the leaf of the plant, while stroma is the fluid that fills the inner space of a chloroplast. b) Stoma is the singular of stomata, the fluid that fills the inner space of a chloroplast, while stroma are the gas exchange pores in the leaf of the plant. c) Stoma is the singular of stomata, the gas exchange pores in the leaf of the plant, while stroma is the disk-like membranous sac in which the light-reactions of photosynthesis take place. d) Stoma refers to the non-sexual cells of a plant, while stroma is the fluid that fills the inner space of a chloroplast. e) Stoma is the fluid that fills the inner space of a chloroplast, while stroma is a stack of disk-like thylakoids.