Plants Nutrition and Transport

What is transpiration?

• evaporation of water

• loss of water from the leaves

• loss of water through stomata of the leaves

• loss of water vapour through stomata of the leaves

What is translocation?

• transport of water and nutrients

• transport of sugar down the plants

• transport of sugar from photosynthetic parts to all other parts of the plant

• transport of starch from the leaves down the plant

Which environmental condition lowers the rate of transpiration?

• abundant sunlight

• high temperatures

• low internal CO₂ concentration

• high relative humidity

Water and mineral salts move in which direction within the plant?

• upward

• downward

What is the most common storage form of sugar in plants

• glucose

• sucrose

• starch

• cellulose

What are the components of phloem?

• sieve tubes

• sieve plates

• companion cells

• all of the above

How is the xylem adapted to its functions?

• it has an empty lumen and thickened with lignin

• it has no cross walls

• it has no protoplasm

• all of the above

Where does translocation takes place in?

• vascular tissues

• phloem

• stomata

• xylem

What are the limiting factors of photosynthesis?

• light intensity, CO₂ concentration, temperature

• wavelengths of light, CO₂ concentration, temperature

• light intensity, O₂ concentration, temperature

• light intensity, CO₂ concentration, air humidity

Tags

NGSS.MS-LS1-6

How are guard cells adapted to its functions?

• contains chlorophyll

• contains proton pumps and K⁺ ion channels

• thicker and elastic inner cell wall

• all of the above