One of the Experiments in Phototropism Involved Cutting Off the Tips

question 19

Multiple Choice

One of the experiments in phototropism involved cutting off the tips of grass seedlings before exposing them to light from one side.The decapitated seedlings did not bend toward light.A valid conclusion from this experiment would be that

• A)light is perceived by the tip of grass plants.
• B)plants cannot engage in photosynthesis without the tip of the plant.
• C)hormones are produced in all parts of the plant.
• D)a foil cover over the tip of the seedlings would cause them to bend.

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Definitions:

Theory of Evolution

A scientific explanation for the diversity of life on Earth, proposing that species change over time through processes such as natural selection.

Charles Darwin

A British naturalist renowned for his theory of evolution through natural selection, fundamentally changing the study of biology.

Biologist

A scientist who studies living organisms and their interaction with each other and their environments.

Biological Male

An individual whose primary sex characteristics at birth include male genitalia and other male physiological features, based on genetic and hormonal factors.