Photosynthesis 2 (Limiting factors)

Food, water, sunlight, shelter, and space are resources that are  __________.

• limiting factors
• wet
• messy
• found in rocks

Tags

NGSS.MS-LS2-1

How does temperature affect photosynthesis?

• Increases the rate at which enzymes work
• Gives the plant energy to perform photosynthesis
• Stops certain enzymes that interfere with photosynthesis working

What is a limiting factor?

• The factor which increases the rate of a reaction
• The factor that limits the reaction rate
• The factor that limits the rate at which an enzyme is destroyed

Tags

NGSS.HS-PS1-5

Increasing temperature can increase enzyme activity to a certain point. Then what happens?

• The enzymes have completed all the reactions so stop
• The enzymes have been denatured or destroyed
• Nothing - the rate continues to increase all the time

If a plant receives more carbon dioxide, what happens to the rate of photosynthesis?

• Increases
• Decreases
• Stays the same

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-1

How can greenhouses increase the rate of photosynthesis?

• Controlling and trapping heat to increase photosynthesis
• Stopping rainfall affecting plant growth
• Surrounding plants in the colour green makes them more likely to photosynthesise
• Plants are only given what they need instead of just taking everything they can find

Tags

NGSS.MS-LS1-6

Which conclusion best matches the trends shown on the graph?

• Bean plants produce more ATP than corn plants.
• Corn plants require more oxygen than bean plants.
• Corn plants release more carbon dioxide than bean plants.
• Corn plants produce sugars at a faster rate than bean plants.

Tags

NGSS.MS-LS1-6

The rate of photosynthesis is affected by all of the following except

• the amount of salt.
• the availability of water.
• light intensity.
• temperature (enzymes).

Tags

NGSS.MS-LS1-6

Which lettered graph represents the affect of light intensity on photosynthetic rate?

• A

• B

• C

• D

Tags

NGSS.MS-LS1-6

All of the definitions below are descriptions of a 'limiting factor'.

Which of these is the IGCSE Biology definition?

• a factor in the environment that runs out

• something present in the environment in such short supply that it restricts life processes

• a factor in the environment that is in short supply

• something present in the environment in such short supply that it stops life processes