If Concrete Is Moist-Cured for 7 Days, Its Strength Is

question 27

Multiple Choice

If concrete is moist-cured for 7 days, its strength is up to about ____ percent of full strength.

• A) 60
• B) 75
• C) 85
• D) 95

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Definitions:

Kin Selection

A biological approach that prioritizes the reproductive achievements of an organism's kin, sometimes sacrificing the organism's own life and reproductive potential.

Coefficient of Relatedness

A measure of the genetic similarity between individuals, used to predict the likelihood of altruistic behavior.

Evolution of Altruism

The process through which selfless behaviors that benefit other individuals at a cost to oneself become advantageous in evolutionary terms.

Group Selection

A theory in evolution proposing that natural selection operates on groups, not just individuals, for the survival benefit of the group.