PLANT PHYSIOLOGY
TRANSPORT IN PLANT
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
companion cells on a hot sunny day
|
|
|
root hair cells on a cool cloudy day
|
|
|
sieve tube elements during a warm night
|
|
|
xylem vessels on a warm sunny day
|
Detailed explanation-1: -Plant roots absorb mineral salts including nitrates needed for healthy growth. For healthy growth plants need mineral ions including:-Nitrate for producing amino acids which are then used to form proteins.-Magnesium which is needed for chlorophyll production.
Detailed explanation-2: -The roots absorb water and minerals from the soil and anchor the plant in the ground. The stem supports the plant above ground, and carries the water and minerals to the leaves. The leaves collect energy from the Sun and make food for the plant, using an amazing process called photosynthesis.
Detailed explanation-3: -Transpiration is ultimately the main driver of water movement in xylem. The cohesion-tension model works like this: Transpiration (evaporation) occurs because stomata are open to allow gas exchange for photosynthesis.
Detailed explanation-4: -Plants absorb water from the soil by osmosis. They absorb mineral ions by active transport, against the concentration gradient.