Topic 1 Lesson 4

Multiple Choice

Which of the following best describes how environmental factors and genetic makeup interact to determine the height of a human?

• Environmental factors have no impact on height, which is determined solely by genetics.

• Height is determined solely by environmental factors like diet and exercise.

• Genetics set the potential for height, while environmental factors such as nutrition can influence whether this potential is reached.

• Height is randomly determined and not influenced by genetics or environmental factors.

Multiple Choice

What is the role of auxin in plant growth?

• It slows down plant growth

• It helps plants respond to light

• It is not important for plants

• It only affects flowers

Multiple Choice

Plants curling around a pole or mailbox is an example of:

• Hydrotropism

• Gravitropism

• Phototropism

• Thigmotropism

Multiple Choice

What is photoperiodism in plants?

• A response to temperature changes

• A response to seasonal changes in light

• A response to soil moisture

• A response to nutrient availability

Multiple Choice

Many plants experience regular periods of dormancy. Which of these best explains the benefits of dormancy?

• It prevents the plant producing too many offspring.

• It allows the plant time to adapt to changing conditions.

• It reduces competition between plants of different species.

• It allows the plant to conserve nutrients until conditions improve