Natural selection _____
A) is a random process
B) creates beneficial mutations
C) eliminates harmful mutations
D) can favor beneficial mutations
Answer: D
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Which of the following statements is true concerning euglenids?
A. Some euglenids are pathogenic to humans. B. Most have a cell wall. C. The storage polysaccharide in euglenoids is NOT paramylon. D. In the euglenoids, Rubisco (enzyme) is NOT involved in photosynthesis E. All of the above is CORRECT.
Answer the following statements true (T) or false (F)
1. Fermentation is a more efficient form of energy production than aerobic respiration. 2. Substrate phosphorylation occurs when protons pass through ATP synthase and combine with oxygen to make water. 3. In cellular respiration, an H+ electrochemical gradient is formed so that the H+ concentration is lower in the intermembrane space than inside the matrix. 4. If oxygen is present, pyruvate will be converted to acetyl CoA in the mitochondrial matrix.
The main point of entry of water into the blood of freshwater fishes is through:a
the skin. b. the gills. c. the mouth. d. the anus. e. the eyes
Use the Hardy-Weinberg equations: p + q = 1 and p2 + 2pq + q2 = 1. If the dominant allele frequency is 0.8, then what percent of the population will be homozygous recessive?
A. 0.64 B. 0.32 C. 0.04 D. 0.16 E. 0.40