Vascular Plants Are Thought to Be the Result of a Single

question 125

Multiple Choice

Vascular plants are thought to be the result of a single evolutionary event: the evolution of a wholly new cell type, 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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Definitions:

General Population

The total group of individuals in a particular area or country, excluding specific subgroups selected for analysis or research.

Panic Attacks

Sudden episodes of intense fear or discomfort, which may include symptoms like palpitations, sweating, or feelings of losing control.

Chronic Muscle Tension

Persistent tightness or strain in the muscles that can result from stress, overuse, or underlying health conditions.

Sympathetic Nervous System

The Sympathetic Nervous System is part of the autonomic nervous system that prepares the body for rapid response to stressors, such as by increasing heart rate and blood flow to muscles.