Periderm consists of mostly
A) epidermis.
B) cork cells.
C) endodermis.
D) lateral meristem.
E) undifferentiated cells.
B
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As a youngster, you drive a nail in the trunk of a young tree that is 3 meters tall. The nail is about 1.5 meters from the ground
Fifteen years later, you return and discover that the tree has grown to a height of 30 meters. About how many meters above the ground is the nail? A) 0.5 B) 1.5 C) 3.0 D) 15.0 E) 28.5
What is the specific role of cyanobacteria (or green algae) in lichens?
A. to help attach the lichens to surfaces B. to synthesize defensive compounds C. to provide fungi with nutrients in usable forms D. to transport water throughout lichens E. Cyanobacteria and green algae play no role in lichens, as lichens consist of fungi.
Which of the following statements is the most accurate description of fruits and seeds?
A. "Fruits" and "seeds" are synonymous terms. B. Fruits always have fleshy coverings, while those of seeds are always hard. C. Fruits are structures that contain seeds and foster seed dispersal. D. Fruits contain endosperm but seeds do not. E. Fruits are produced only by angiosperms and seeds are produced exclusively by gymnosperms.
Which one of the following statements about the trophic cascade in the sea otter and sea urchin-kelp communities along the West Coast of North America are true? Check all that apply.
_____ Increased sea otter populations are linked to more profuse growth of the kelp forests. _____ Increased orca (killer whale) predation on sea otters is linked to more profuse growth of the kelp forests. _____ Increased sea otter populations are linked to increased sea urchin populations. _____ Increased orca (killer whale) predation on sea otters is linked to increased sea urchin populations. _____ Increased sea urchin populations are linked to less profuse growth of the kelp forests.