Which of the following are products of mitosis?
a. gametes in animals and spores in plants
b. gametes and spores in plants
c. body cells in animals and spores in plants
d. body cells in animals and plants
Answer: d. body cells in animals and plants
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The first living cells were most likely
A. aerobic, photosynthetic, eukaryotic. B. aerobic, photosynthetic, prokaryotic. C. anaerobic, heterotrophic, prokaryotic. D. anaerobic, heterotrophic, eukaryotic. E. anaerobic, chemotrophic, eukaryotic.
The second messenger inositol triphosphate (IP3) appears to be involved in stomatal closure triggered by ____
a. auxins b. abscisic acid c. oligosaccharins d. salicylic acid e. gibberellins
An earthworm detects sound ____
a. through specialized tympanic membranes located near the head b. through a thinned region of the exoskeleton that forms a tympanum c. through general mechanoreceptors on its skin d. by using a specialized organ that measures the frequency of vibration of the surrounding dirt particles e. through a series of mechanoreceptors arranged in a lateral line
Pioneer plant species are usually characterized
by a. small size. b. high dispersal rates. c. slow maturation. d. high dispersal rates and high numbers of offspring e. small size, efficient dispersal mechanisms, and slow maturation.