Vascular Plants Are Thought to Be the Result of a Single

question 81

Multiple Choice

Vascular plants are thought to be the result of a single evolutionary event: the evolution of the tracheid.This cell type

• A) provides a mechanism for the storage of a new type of carbohydrate (starch).
• B) is the first cell type to contain chloroplasts.
• C) permits fertilization in the absence of water,thus permitting plants to invade dry habitats.
• D) forms the seed.
• E) is the principal water-conducting element of the xylem in all vascular plants except for the angiosperms.

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