A Common Mutation in the 5,10-Methylenetetrahydrofolate Reductase Enzyme (MTHFR)____

question 2

Multiple Choice

A common mutation in the 5,10-methylenetetrahydrofolate reductase enzyme (MTHFR) ____.

• A)prevents the individual from activating the B vitamin folate
• B)has no effect on the activity of the enzyme
• C)increases the activity of the enzyme
• D)modifies the folate molecule directly

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Definitions:

Competitive Exclusion

A principle that two species competing for the same resources cannot coexist at constant population values if other ecological factors remain constant.

Secondary Succession

An ecological succession that takes place after some disturbance destroys the existing vegetation; soil is already present. See succession.

Resource Partitioning

The process by which species adapt to competition by utilizing different parts of the available resources, reducing direct competition.

Realized Niche

The actual conditions and resources in which a species exists due to biotic and abiotic constraints, as opposed to its potential range.