Why might these species be the first to recover?
a. Grasses were not eliminated by the fire, prairie dogs and antelope have mobility.
b. Grasses have a short generation time, as do prairie dogs and antelope.
c. Grass reproduction is stimulated by fire, and prairie dogs and antelope both feed on grasses.
d. None of the above.
a
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Which of these is not part of the life cycle of brown algae?
A. meiosis B. multicellular haploid stage C. multicellular diploid stage D. gametes produced by mitosis E. spores produced by mitosis
Which of the following is common to both meiosis and mitosis?
a. DNA replication must occur prior to these divisions. b. Homologous pairs must form. c. Cytokinesis occurs twice. d. The chromosome number does not change
Melanin absorbs UV radiation and can therefore protect against some forms of skin cancer. Which type of cells produce melanin?
A. melanocytes B. chondrocytes C. actinocytes D. lymphocytes E. osteocytes
Copyright© The Mc-Graw-Hill Companies,Inc, Permission Required for reproduction or display.Based on a variety of experiments, it is known that the rate of photosynthesis is highest when wavelengths of light between 400 and 500 nm are used, and when wavelengths around 700 nm are used. What does this indicate about the relative importance of chlorophyll a and b in photosynthesis?
A. Reflection of light by chlorophyll a and b is essential for the process of photosynthesis B. Absorption of light by chlorophyll a and b is essential for the process of photosynthesis C. Transmission of light by chlorophyll a and b is essential for the process of photosynthesis D. Chlorophyll a and b are much less important than other pigments in the reflection, absorption and transmission of light relevant to photosynthesis