Which of these processes can be included among those responsible for the horizontal components of the figure above?
A) endosymbiosis
B) mitosis
C) binary fission
D) point mutations
A
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Jermaine and Shikia are healthy parents of three young children. The oldest two, Bethany and Amber, are healthy, and they are six and four, respectively. Their youngest child, Roscoe, was born with Peeling Skin Syndrome two years ago. Roscoe's skin constantly peels, and is red and itchy. If Jermaine and Shikia have another child, the probability that he or she will inherit the skin condition is
A) 1/8. B) 1/4. C) 1/3. D) 2/3.
Increase in the population of photosynthetic
bacteria using the oxygen-releasing pathway led to an increase in the oxygen levels in the seas and air. What was (were) the major consequence(s) of that change? I. aerobic respiration became the major mode of life II. all anaerobic organisms went extinct III. formation of ozone layer
a. I only b. II only c. I and II d. I and III e. I, II, and III
In thylakoids, protons travel through ATP synthase from the thylakoid space to the stroma. Therefore, the catalytic "knobs" of ATP synthase would be located
A) on the side facing the thylakoid space. B) on the ATP molecules themselves. C) on the pigment molecules of photosystem I and photosystem II. D) on the stromal side of the membrane. E) built into the center of the thylakoid stack (granum).
Some of the daughter cells resulting from clonal selection of a B cell differentiate into plasma cells. Which of these is a function of plasma cells?
A) They produce specific antibodies and release them into the blood. B) They transform into helper T cells and bind to antigens displayed by a dendritic cell. C) They act as natural killer cells and destroy cancer cells. D) They are responsible for cell-mediated immunity.