Plants Need to Respond to Stimuli too

Question 1

How do plants increase their chances of survival?

Answer 1

By responding to charges in their environment

Question 2

What are 3 ways in which plants respond to changes in their environment?

Answer 2

• sense direction of light and grow towards it to maximise light absorption for photosynthesis
• sense gravity, so roots and shoots grow in right direction
• climbing plants have sense of touch, find things to climb and reach sunlight

Question 3

What is the first way plants are more likely to survive?

Answer 3

If they respond to the presence of predators to avoid being eaten

Question 4

What is an example of a plant responding to a predator?

Answer 4

White clover is a plant that can produce toxic substances to cattle.

Question 5

What is the second way a plant is more likely to survive?

Answer 5

If they respond to abiotic stress - anything harmful that’s natural but non-living like a drought

Question 6

What is an example of a plant responding to abiotic stress?

Answer 6

Carrots produce antifreeze proteins at low temps - protein bind to ice crystals and lowers temp that water freezes at, stopping more ice crystals from growing