Plant Physiology Ch. 9 Exam

What is acclimation?

• The process of an organism adjusting to a new environment or conditions, but staying the same when matured

• The process of an organism evolving rapidly and continuing to do so forever

• The process of an organism adapting to a new environment and then dying

• The process of an organism hibernating and never evolving for the rest of their life

What is plasticity (in relation to plants)?

• The process of turning plants into plastic in order to help the environment

• Plastic material used in plant cultivation to make them grow stronger and look prettier

• The ability to adjust morphologically, physiologically, and biochemically in response to changes in the environment

• The ability of plants to produce plastic in order to defend themselves from predators

How are shade leaves different than sun leaves?

• Shade leaves are smaller and have less chlorophyll compared to sun leaves.

• Shade leaves are the same size as sun leaves but have more chloroplasts.
• Shade leaves are more resistant to sunlight than sun leaves.
• Shade leaves are thinner and have more chlorophyll compared to sun leaves.

How are sun leaves different from shade leaves?

• Sun leaves are thinner, have more chlorophyll, and have less Rubisco when compared to shade leaves.

• Sun leaves are larger, thicker, and have less chlorophyll when compared to shade leaves.

• Sun leaves are thinner, smaller, and have less chlorophyll when compared to shade leaves.

• Sun leaves are thicker, have more chlorophyll, have a xanthophyll-cycle, and have more Rubisco when compared to shade leaves.

What's the difference between C3 and C4 plants (based on photosynthesis and temperature)?

• C3 plants are more efficient at high temperatures compared to C4 plants.
• C3 plants require less water than C4 plants.
• C3 plants are less efficient at high temperatures compared to C4 plants.
• C3 plants and C4 plants have the same efficiency at all temperatures.

How do plants dissipate excess light energy?

• The xanthophyll-cycle

• Photoinhibition
• Photosynthesis
• Photorespiration

What is the xanthophyll-cycle?

• The xanthophyll-cycle is a process in bacteria that involves the conversion of chlorophyll to carotenoids.
• The xanthophyll-cycle is a process in fungi that involves the conversion of zeaxanthin to violaxanthin.
• The xanthophyll-cycle is a process in animals that involves the conversion of lutein to beta-carotene.
• The xanthophyll-cycle is a process in plants that involves the conversion of violaxanthin to zeaxanthin in response to excess light.

How do chloroplasts move when exposed to excess light energy?

• Chloroplasts line up around the cell walls and shade each other

• Chloroplasts become immobile and avoid each other

• Chloroplasts shrink in size and bump into each other

• Chloroplasts multiply rapidly and eat each other

What is photoinhibition?

• Photoinhibition is the process where plants use excess light energy to increase growth.
• Photoinhibition is the process where excess light energy damages the photosynthetic machinery in plants.
• Photoinhibition is the process where plants convert excess light energy into nutrients.
• Photoinhibition is the process where plants absorb excess light energy efficiently.

What is dynamic photoinhibition?

• Photoinhibition where quantum inefficiency increases but maximum photosynthetic weight decreases

• A mechanism to prevent excess light absorption
• A method to increase chlorophyll production
• Photoinhibition where quantum inefficiency decreases but maximum photosynthetic weight remains unchanged