You are studying leaf size in a natural population of plants. The second season is particularly dry, and the following year the average leaf size in the population is smaller than the year before. But the amount of overall variation is the same, and the
population size hasn't changed. Also, you've done experiments that show that small leaves are better adapted to dry conditions than are large leaves. Which of the following has occurred?
A) stabilizing selection B) disruptive selection
C) genetic drift D) directional selection
Answer: D
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Which of the following is NOT a process of aerobic respiration?
A. citric acid cycle B. glycolysis C. acetyl CoA formation D. oxidative phosphorylation E. lactate fermentation
An atom X contains 14 protons, 13 electrons, and 12 neutrons, and atom Y contains 14 protons, 14 electrons, and 12
neutrons. What can you conclude? a. Y is an ion but X is not. b. X and Y are both ions. c. X and Y both have filled valence shells. d. X and Y are isotopes of the same element. e. X and Y are atoms of the same element.
In eukaryotic cells, chromosomes are composed of both DNA and proteins
Indicate whether the statement is true or false
Which of the following fungal infections can be contracted through thorn pricks or wood splinters?
A) Sporothrix schenckii B) Cladophialophora C) Malassezia furfur D) Gyromitra esculenta E) Aspergillus