Which of the following features characterizes diatoms?
a. laminarin and oils as food reserves
b. protective plates of cellulose in their cells
c. chlorophylls a and c and carotene
d. paramylon as a food storage molecule
Ans: c. chlorophylls a and c and carotene
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How does an enzyme work to catalyze a reaction?
A. It raises the temperature of a reaction. B. It lowers the activation energy of a reaction. C. It allows the reaction to proceed through different intermediates. D. It supplies the energy to speed up a reaction. E. It increases the concentration of the reactants in a reaction.
We would expect to find fatty acids with ____ carbons in living organisms
a. 8 b. 13 c. 16 d. 19 e. 26
How does a plant's cuticle allow it to live on land?
A. By increasing structural support B. By preventing the gametes from drying out C. By preventing water loss D. By absorbing nutrients from the soil
The primate fossil named Lucy was ____.
A. a Neanderthal B. an australopith C. a Denisovan D. a prosimian E. a modern human