Labeling.The following statements refer to the accompanying figure showing the fine structure of a leaf
Figure 27.12A
A. Epidermis is labeled ____.
B. Cells rich in chlorophyll and thus the main sites of photosynthesis are in layers labeled ____.
C. The spongy mesophyll is labeled ____.
A. 1
B. 2
C. 3
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The evolution of prezygotic barriers to reproduction after postzygotic barriers already exist is called ____
a. species fusion b. reinforcement c. adaptive radiation d. geographic isolation e. hybridization
The general term that describes the body’s overall ability to resist and combat disease and infections is ____
a. inflammation b. synthesis c. cell activity d. immunity e. production
In the accompanying figure, the taxon labeled II is:
a. a clade. b. paraphyletic. c. polyphyletic. d. an outgroup. e. monophyletic.
Native Americans planted crops of corn, squash, and beans. The beans increased the level of nitrogen in the soil. The corn required high levels of nitrogen and provided a support for the beans to climb and receive more sunlight
The large leaves on the squash shaded the ground and limited weed growth. This agricultural method A) caused mass extinctions. B) reduced the ecosystem services. C) is a type of sustainable agriculture. D) increased the number of pests in the fields. E) created wildlife corridors.