Most of the photosynthetic activity of a leaf takes place in the.
A. vascular bundles
B. waxy cuticle and epidermis
C. palisade and spongy mesophyll
D. guard cells and stomata
Answer: C. palisade and spongy mesophyll
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Reef-building corals have a symbiotic relationship with algal cells called ________ that live within the cells of corals
Fill in the blank(s) with correct word
Which of the following best explains the energetic status of cellular respiration?
a. It is an exergonic process, with negative free energy. b. It is an endergonic process, with negative free energy. c. It is an exergonic process, with positive free energy. d. It is an endergonic process, with negative free energy.
Which of the following is TRUE about group selection?
a) It is a common occurrence in large populations. b) It is at least as common as reciprocal altruism. c) It leads to unselfish individual behavior that benefits the population or species. d) It tends to increase altruistic behavior. e) It becomes progressively more common over several generations.
The direction of cellulose microfibril synthesis in elongating plant cells is
a. parallel to the direction of cell elongation. b. perpendicular to the direction of cell elongation. c. perpendicular to the direction of microtubules under the plasma membrane. d. parallel to the endoplasmic reticulum under the plasma membrane. e. both b and d