The specific abiotic factors defining a biome are _____
I) annual variation in temperature and precipitation
II) average annual temperature and moisture levels
III) maximum annual temperature and moisture levels
IV) maximum annual temperatures, moisture levels, and average annual temperature
A) only I and II
B) only III and IV
C) only I, II, and IV
D) only II, III, and IV
E) only I, II, and III
Answer: A
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Answer the following statements true (T) or false (F)
1. Facilitated diffusion is required for the movement of Na+ out of the cell. 2. The Na+/K+-ATPase pump is a ligand-gated ion channel. 3. A macrophage (immune cell) consuming a bacteria is best described as phagocytosis. 4. Ion gradients across the membrane drive numerous cellular functions.
The manufacturers of dietary supplements are known for making misleading claims that are often unsupported by science and medicine. Based on what you know about cell respiration and ATP, which of these claims about a supplement is plausible and potentially beneficial?
a. Doubles the free energy released from carbohydrates! b. Stabilizes ATP molecules for long-lasting metabolic energy! c. Reduces the energy needed to regenerate ATP molecules! d. Stops oxidation inside energy-producing mitochondria!
Which of the following is true for the cell shown
above? a. They patrol the body looking for invaders. b. They present antigens to other WBC’s. c. They specifically interact with T-helper cells. d. They mature only after they encounter damaged tissue. e. All of these are true.
Which scenario describes a situation for which genetic counseling is recommended?
a. Couples who have no family history of genetic disorders b. Women under age 35 who plan to become pregnant c. Couples who already have a child with a birth defect d. Couples who have undergone IVF e. Women who have had one miscarriage, and no other pregnancies