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:

Marginal Product

The additional output that can be produced by adding one more unit of a specific input, holding all other inputs constant.

Variable Input

An input in the production process that can be adjusted in the short term, such as labor or raw materials, to change the output level.

Total Output

The combined quantity of production or services produced by an entity in a given period.

Fixed Costs

Expenses that do not change with the level of production or sales, such as rent, salaries, and insurance.