When a Developmental Scientist Presents Two Identical Glasses with Liquid

question 6

Multiple Choice

When a developmental scientist presents two identical glasses with liquid at the same level, the child study participant agrees that both contain the same amount of liquid. Next, when the liquid is poured from one of the short, wide glasses into a tall thin glass, the concrete operational child concludes that

• A) one of the glasses is longer
• B) one of the glasses has more liquid
• C) both glasses have the same amount of liquid
• D) teach glass is half full

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Definitions:

Directional Selection

Outcome of natural selection in which an extreme phenotype is favored, usually in a changing environment.

Cladogram

In cladistics, a branching diagram that shows the relationship among species in regard to their shared derived characters.

Common Ancestor

An ancestral species from which two or more species evolved.

Natural Selection

The process by which organisms better adapted to their environment tend to survive and produce more offspring, a fundamental concept in evolutionary biology.