Saber teeth found in different groups of extinct carnivorous mammals are considered ________ structures, as the fossil record shows that saber teeth evolved independently among the groups.

Fill in the blank(s) with the appropriate word(s).


homoplastic

Biology & Microbiology

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Arrange the small intestine components in order of size from largest to smallest

What will be an ideal response?

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A gaseous hormone produced by plants that helps control fruit ripening is

A. carbon dioxide. B. auxin. C. ethylene. D. chlorophyll. E. carotene.

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Cotyledons and endosperm both provide nutrition. What is the difference between them?

A) Cotyledons provide nutrition for the developing embryo; endosperm provides nutrition for the young seedling. B) Endosperm provides nutrition for the developing embryo; cotyledons provide nutrition for the young seedling. C) Cotyledons are found only in flowering plants; endosperm is found only in young ferns. D) Endosperm is found only in monocots; cotyledons are found only in dicots. E) Endosperm is always photosynthetic; cotyledons are usually not.

Biology & Microbiology

Carnivorous plants evolved because which of the following nutrients is often extremely limited in their habitats?

A. carbon B. nitrogen C. iron D. O2 E. CO2

Biology & Microbiology