Wilting of a plant occurs
a. if the plant is placed in an isotonic solution.
b. if there is a rise in turgor pressure.
c. as a result of facilitated diffusion.
d. if the plant is placed in a hypertonic
solution.
e. if the plant is placed in a hypotonic
solution
D
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What conclusions are consistent with these data? (Select all that apply.)
A researcher is studying the rII locus of phage T4. Three rII- strains are obtained: A, B, C, and D. In the first experiment, E. coli strain K(?) is coinfected with two rII- strains simultaneously and the results are recorded. Infection with A and B phage = plaques form Infection with A and C phage = plaques form Infection with B and C phage = no plaques form Infection with B and D phage = no plaques form Infection with C and D phage = no plaques form In a second experiment, coinfections are performed first in E. coli strain B, then the progeny phage are used to infect E. coli strain K(?). Progeny of A and B phage = plaques form Progeny of B and C phage = plaques form Progeny of C and D phage = plaques form Progeny of B and D phage = no plaques from A) Strains B and D both carry the same mutation. B) Strains B, C, and D carry mutations in the same gene. C) Strain A carries a mutation in a different gene than strains B, C, and D. D) Strains A and B carry mutations in the same gene. E) Strains B and C both carry the same mutation. F) A, B, C, and D carry mutations in the same gene.
In the absence of a nerve connection or electrical stimulation, can a muscle cell be made to contract in a laboratory
setting? Explain your answer. What will be an ideal response?
Name two human traits that would be expected to have high concordance
What will be an ideal response?
Sixteen-year-old Rhapsody has just learned that her younger brother Clyde is colorblind. Although she knows she has color vision because her cat, Juice, is clearly orange, and she reads that nearly all people with colorblindness are boys, she is concerned about her own sons one day. If she is a carrier for colorblindness, then the risk that a son of hers is colorblind is
A) dependent on the genes the child's father contributes. B) 1/8. C) 1/4. D) 1/2.