การขนส่งในพืช

The plant tissue that carries food materials DOWNWARD from the leaves to the rest of the pant is the ______.

• Phloem
• Stomata
• Chlorophyll
• Xylem

what is the function of root hair?

• it is place to store the food
• it has large surface area to absorb more water

How do water enter the roots from the soil?

• diffusion
• osmosis
• transpiration
• active transport

Transpiration is

• the movement of water through a plant from the roots up the stem
• the loss of water from the leaves of a plant by the process of evaporation
• the flow of water into plant roots by osmosis from the soil
• the process of minerals and sugars moving through plant veins

Why is the evaporation of water from leaves important?

• It cools leaves and helps move water up the plant.
• It makes the plant wilt
• It helps the plant to respire

What do the guard cells do?

• Control active transport

• Control nutrients moving into the cell

• Controls the rate of transpiration (loss of water through the leaf)

What does phloem transport?

• Water

• Minerals

• Fruit

• Sugar

What is the main factor that influences the rate of sugar transport?

• movement of water

• Rate of photosynthesis

• capillary action

• uprooting plants

Xylem vessel elements are strengthened by

• lignin
• cellulose
• melanin
• pericycle

How will lowered humidity affect the rate of transpiration?

• decrease it
• increase it
• no change
• it depends