Which feature would be the least useful in determining if a protist were a close relative of plants?
A. Capacity for photosynthesis
B. Plasmodesmata between cells
C. Cellulose cell walls
D. Enzymes for ATP production
Answer: D
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Which of the following respiratory surface properties enhances the diffusion of respiratory gases?
a. large surface area b. thick epithelial layer c. cool temperatures d. the presence of active transport pumps e. presence of carbon dioxide
Which of the following sources of energy
powers the light-independent reactions of photosynthesis?
a. light b. ATP and NADPH c. photosystem 2 d. glucose e. NADP+
Why do many plants use the photoperiodic pathway to regulate the timing of flower formation?
A. This allows plants to link flowering to day length, which corresponds to the season when conditions are optimal. B. Flower petals carry out high levels of photosynthesis and require high light conditions. C. A minimum amount of light is always necessary for flowering. D. This allows plants to link flowering to temperature, which corresponds to the season when conditions are optimal.
Answer the following questions true (T) or false (F)
1. Trypanosoma brucei is transmitted to animals and people by a bloodsucking fly. 2. Rabies is a rare zoonosis in humans but common in many other species of mammal. 3. Fungi rarely infect the central nervous system.