One effect of auxin, which triggers the elongation of cells, is to affect cell walls by increasing their

A. plasticity.
B. permeability.
C. water solubility.
D. thickness.
E. stiffness.


Answer: A

Biology & Microbiology

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Gray seed color in peas is dominant to white. Assume that Mendel conducted a series of experiments where plants with gray seeds were crossed among themselves, and the following progeny were produced: 302 gray and 98 white

(a) What is the most probable genotype of each parent? (b) Based on your answer in (a) above, what genotypic and phenotypic ratios are expected in these progeny? (Assume the following symbols: G = gray and g = white.) A) (a) GG × gg; (b) genotypic = 3:1, phenotypic = 1:2:1 B) (a) Gg × Gg; (b) genotypic = 1:2:1, phenotypic = 3:1 C) (a) GG × Gg; (b) genotypic = 1:2:1, phenotypic = 2:1 D) (a) gg × Gg; (b) genotypic = 1:2, phenotypic = 3:1 E) (a) Gg × Gg; (b) genotypic = 3:1, phenotypic = 9:3:3:1

Biology & Microbiology

The direct yield of ATP from the electron transport system is:

1.2 2.8 3.32 4.36 5.48

Biology & Microbiology

Four of the five scientists listed below are related by

a common observation. Select the exception. a. Hooke b. Galileo c. Schwann d. Schleiden e. Virchow

Biology & Microbiology

The normal human karyotype contains __________ chromosomes

a. 22 b. 23 c. 44 d. 46 e. 54

Biology & Microbiology