What prompts a newborn baby to start to breathe?
A) an increase in the concentration of carbon dioxide in the baby's blood
B) a decrease in the concentration of oxygen in the baby's blood
C) a change in the temperature on the surface of the skin
D) exposure to air
Answer: A
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In which of these groups does it appear that the cuticle evolved?
A. Streptophytes B. Bryophytes C. Algae D. Land plants E. Pterophytes
Whose work on spontaneous generation first demonstrated the existence of a very heat-resistant form of bacteria that are called endospores?
A. Redi B. Tyndall C. Pasteur D. Schwann
Among the effects of vitamin A deficiency are
a. dry skin, eyes, and mucous membranes. b. increased vulnerability to infections of the skin, eyes, and mucous membranes. c. impaired growth and development. d. mental impairment. e. all of these.
Explain why Mendel choose seven different varieties of pea plants for his experiments. What will be an ideal response?