Factors Affecting Photosynthesis

​2.2 Factors Affecting Photosynthesis

By Meaghan Vollers

Multiple Choice

What is photosynthesis?

• The process by which green plants and some other organisms use sunlight to synthesize oxygen with the help of chlorophyll pigment, carbon dioxide, and water.

• The process by which green plants and some other organisms use sunlight to synthesize foods with the help of chlorophyll pigment, carbon dioxide, and water.

• The process by which green plants and some other organisms use moonlight to synthesize foods with the help of chlorophyll pigment, carbon dioxide, and water.

• The process by which green plants and some other organisms use sunlight to synthesize water with the help of chlorophyll pigment, carbon dioxide, and oxygen.

Multiple Choice

How does light intensity affect photosynthesis?

• Light intensity has no effect on photosynthesis.

• Light intensity decreases the rate of photosynthesis.

• Light intensity increases the size of the plant.

• Light intensity affects the rate of photosynthesis.

Multiple Choice

How does carbon dioxide concentration affect photosynthesis?

• Higher carbon dioxide levels generally decrease the rate of photosynthesis.

• Carbon dioxide concentration has no effect on photosynthesis.

• Higher carbon dioxide levels inhibit the process of photosynthesis.

• Higher carbon dioxide levels generally increase the rate of photosynthesis.

Multiple Choice

What is the role of chlorophyll in photosynthesis?

• Chlorophyll absorbs carbon dioxide and releases oxygen.

• Chlorophyll provides structural support to plants.

• Chlorophyll helps in the process of cell division.

• Chlorophyll captures light energy and converts it into chemical energy.

Multiple Choice

What is the relationship between photosynthesis and water availability?

• Photosynthesis is unrelated to water availability.

• Water availability is essential for photosynthesis.

• Photosynthesis does not require water.

• Water availability inhibits photosynthesis.

Multiple Choice

Which of these will not affect photosynthesis?

• Light
• Temperature
• Glucose Availability
• Carbon Dioxide

Multiple Choice

Air samples taken in Canada since 1986 show that atmospheric carbon dioxide concentration is higher on average in winter than in summer

Which of the following statements best explains the difference in carbon dioxide concentrations?

• The rate of decomposition is slower in winter than in summer.

• The greenhouse effect is more pronounced in winter than in summer

• The number of animals that are active is less in winter than in summer.

• The amount of photosynthesis by plants is lower in winter than in summer.

Multiple Choice

This chart shows the Effect of Light Intensity on the Rate of Photosynthesis in Elodea Canadensis (Canadian Waterweed)

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Based on the data, how does increasing light intensity affect the rate of photosynthesis in Elodea Canadensis?

• It has no effect on the rate of photosynthesis

•  It decreases the rate of photosynthesis

• It increases the rate of photosynthesis

• It varies depending on other factors