Which of the following cell types does not move materials through the body of the plant?
A. Sieve tube members
B. Xylem vessel members
C. Sclerenchyma
D. Sieve cells
E. Tracheids
Answer: C
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Characteristics of a nerve net include
a. a centralized brain. b. one way flow of information between cells. c. well developed neurons. d. paired ganglia. e. none of these.
In a certain breed of chicken, an incomplete
dominant gene controls color. The homozygous black, when crossed with the homozygous splashedwhite, produces an intermediate gray color pattern referred to as blue. A second gene controls the shape of the comb. The dominant allele (R) produces rose, whereas the recessive allele (r) produces single. Give the F1 and F2 genotypic and phenotypic ratios of a cross between a pure-breeding black single and a pure-breeding splashed-white rose. What will be an ideal response?
During erection, the _____ can be seen as a raised column on the lower side of the penis.
A. fourchette B. corpus spongiosum C. vas deferens D. perineum
In plants, the light-dependent reactions require
A. NADP+. B. ATP. C. Calvin cycle enzymes. D. glucose. E. O2.