Plant Adaptations to Winter Conditions

Some plants, like alfalfa, have developed mechanisms to survive winter by using antifreeze in their roots. They convert starch into antifreeze sugars, which interact to form barriers between cells, preventing ice crystal formation. This process lowers the freezing point of the liquid in the roots, avoiding damage. However, this protective mechanism requires significant energy, which is why plant growth slows during winter.

What happens to the liquid between a plant's cell walls during winter?

• It evaporates.

• It can freeze and break the roots.

• It becomes acidic.

• It turns into gas.

How do plants like alfalfa protect their roots from freezing?

• By growing thicker roots.

• By absorbing more sunlight.

• By converting starch into antifreeze sugars.

• By shedding leaves.

What role do extra sugars play in plant cells during winter?

• They help the plant absorb more nutrients.

• They make the plant more colorful.

• They form a barrier to trap water.

• They increase the plant's height.

Why is the freezing point of the liquid in plant cells lowered?

• To make the plant grow faster.

• To prevent the formation of damaging ice.

• To increase the plant's temperature.

• To attract more insects.

Why do plants show less growth during winter?

• Because they are dormant.

• Because they lose their leaves.

• Because the energy is used for damage control.

• Because they lack sunlight.