Four of the five actions listed below are responses to
cold temperatures. Select the exception.
a. vasoconstriction of peripheral blood vessels
b. uncontrolled muscular contraction
c. thermoreceptors send messages to the
hypothalamus
d. enhanced secretion of sweat glands
e. increased metabolic reactions
Answer: d
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As electrons are passed through the system of electron carriers associated with photosystem II, they lose energy. What happens to this energy?
A) It excites electrons of the reaction center of photosystem I. B) It is lost as heat. C) It is used to establish and maintain a proton gradient. D) It is used to phosphorylate NAD+ to NADPH, the molecule that accepts electrons from photosystem I.
Which of the following distinguish the field of microbiology from other fields of biology?
A. The techniques used to study organisms regardless of their size. B. Neither the size of the organism studied nor the techniques employed in the study of organisms regardless of their size. C. The size of the organism studied. D. Both the size of the organism studied and the techniques employed in the study of organisms.
Which of the following is the best description of decomposition?
a. breaking down inorganic molecules such as carbon dioxide and water into organic molecules such as carbohydrates, lipids, and proteins b. building organic molecules such as carbohydrates, lipids, and proteins from inorganic molecules such as carbon dioxide, water, and nitrogen-containing compounds c. building macromolecules from smaller organic molecules d. breaking down organic molecules into inorganic molecules e. a process undertaken by producers in an ecosystem
Which of the following statements regarding waterborne pathogens is incorrect?
A. Microbes can enter surface water through ordinary exposure to air and soil. B. Waterborne pathogens are primarily Campylobacter, Salmonella, Shigella, Vibrio, and Mycobacterium. C. Waterborne pathogens include bacteria, viruses, and protozoans. D. Encysted protozoans can survive in water for long periods without a human host.