A somatic cell from a corn plant normally contains 20 chromosomes. How many sister chromatids would that cell contain during G2 of the cell cycle?
A. 20
B. 10
C. 40
D. 0
Answer: C
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Answer the following statements true (T) or false (F)
1. A bacterial cell would swell and burst if placed in an extremely hypertonic solution. 2. Pasteurization is a method of sterilizing liquids. 3. Archaeans that live in or near hydrothermal vents at the bottom of the ocean are halophilic, barophilic, and thermophilic. 4. Lyophilization is an excellent method of killing microorganisms. 5. Antiseptic technique is a type of aseptic technique.
Which of the following characteristics do all animals share?
A. They are multicellular prokaryotes. B. They are single-celled eukaryotes. C. They are multicellular eukaryotes. D. They are single-celled prokaryotes.
Which statement about stress is incorrect?
A) Stress increases as population density increases. B) Stress may trigger the release of specific chemical signals or pheromones. C) Stress can stimulate growth and increase the rate of reproduction. D) Stress may result in increased vulnerability to disease.
Water molecules are polar with ends that exhibit partial positive and negative charges. These opposite charges allow water molecules to attract each other through:
A. peptide bonds. B. ionic bonds. C. hydrogen bonds. D. covalent bonds.