AP BIOLOGY

LABORATORY REVIEW

TRANSPIRATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which statement is true about xylem vessels?
A
Xylem are involved in the transpiration process.
B
Xylem can carry substances up and down the plant.
C
Xylem carry food and water to the plant’s leaves.
D
Xylem are tube-like structures that carry food up the plant.
Explanation: 

Detailed explanation-1: -(ii) Xylem transports water and minerals from roots to other parts of the plant.

Detailed explanation-2: -As transpiration occurs, it deepens the meniscus of water in the leaf, creating negative pressure (also called tension or suction). The tension created by transpiration “pulls” water in the plant xylem, drawing the water upward in much the same way that you draw water upward when you suck on a straw.

Detailed explanation-3: -Answer. It is the loss of water as vapour from plants. Reason: Transpiration is the loss of water in the form of water vapours from aerial parts of the plant such as stems, leaves and flowers.

Detailed explanation-4: -Detailed Solution. The correct answer is Water convection. Xylem is a type of tissue in vascular plants that transports water and some nutrients from the roots to the leaves.

There is 1 question to complete.