Water can quickly flow from a plant cell's central vacuole into the cytoplasm through water-conducting channel proteins called _________.
A. Aquaporins
B. Pores
C. Stomata
D. Vesicles
E. Tonoplasts
Answer: A. Aquaporins
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Which of the following statements is FALSE?
A) Sister chromatids of the same chromosome are identical. B) Sister chromatids can be nonhomologous chromosomes. C) Homologous chromosomes are not necessarily identical. D) An example of a nonhomologous chromosome pair is paternal chromosome 1 and paternal chromosome 2 in a human.
The primary cause of human population growth following the Industrial Revolution was
a. an increase in death rates. b. a decrease in death rates. c. an increase in birthrates. d. a decrease in birthrates e. more children being born to women over 35 years of age.
A competent Hemophilus strain is individually transformed by three genes (a, b, and c) at a rate of 0.002% each. However, cotransformation frequencies for each pair are as follows: a and b 0.38 % a and c 0.72% b and c 0
19% What is the correct conclusion from this data? A) Genes b and c are farthest apart. B) Gene order is c, b, a. C) Cotransformation of b and c is so frequent, they must be one gene. D) Gene a is closer to b than to c. E) Genes a and c are farthest apart.
The time in the history of Earth when evolution was progressing at the most rapid rate, as evidenced
by fossils such as those of the Burgess Shale, is the:a. Cambrian period. b. Ordovician period. c. Silurian period. d. Devonian period. e. Carboniferous period