One Experiment in Phototropism Involved Cutting Off the Tips of Grass

question 15

Multiple Choice

One experiment 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 the light. A valid conclusion from this experiment would be that

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

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Definitions:

Gene Expression

The process by which the instructions in our DNA are converted into a functional product, such as a protein, playing a crucial role in biological functions and characteristics.

DNA Change

Alterations in the genetic material of an organism, which can occur naturally through mutation or be induced artificially, affecting traits and possibly resulting in genetic disorders or variations.

Selective Mating

The process by which individuals choose partners based on specific desirable traits, leading to genetic selection.

Sheepherding

The practice of guiding and managing sheep as they move from one place to another, often involving the coordination of herding dogs.