Of the following structures, which one is not made of specialized leaf cells?
A. Sclereids
B. Guard cells
C. Trichomes
D. Tendrils
E. Spines
Ans: A. Sclereids
You might also like to view...
Which germ layer forms first? a. They all form at the same time
b. Mesoderm c. None of these choices. d. Endoderm e. Ectoderm
No matter how much water a human drinks, the kidneys are always regulating various aspects of the blood, including _________________.
I-the pH of the blood II-the plasma concentration of iron ions III-the plasma concentration of sodium ions IV-the plasma concentration of potassium ions V-the temperature of the blood A. I, III, IV, and V B. I, II, III, and IV C. I, II, III, IV, and V D. I, II, and III E. I, III, and IV
Proto-oncogenes are
a. genes that will turn into cancer genes. b. normal genes that promote mitosis. c. genes that produce tumor suppressing proteins. d. cancer genes that back mutate into normal genes. e. normal genes that promote DNA replication.
Which of the following BEST explains the role of enzymes in a reaction
a. An enzyme causes an increase in the rate of reaction by binding to a substrate. b. An enzyme increases the amount of energy needed to complete the reaction. c. An enzyme binds to a product causing a decrease in the rate of the reaction. d. An enzyme increases the temperature of a reaction so that the reaction can occur faster.