AP BIOLOGY

PLANTS

PLANT TISSUE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Phloem is ____ i.e. it moves up and down
A
Unidirectional
B
bidirectional
Explanation: 

Detailed explanation-1: -Flow in Xylem is unidirectional while in Phloem is bidirectional.

Detailed explanation-2: -Transport in the phloem is therefore both up and down the stem. Transport of substances in the phloem is called translocation . Phloem consists of living cells.

Detailed explanation-3: -In a plant, translocation in xylem is unidirectional while in phloem it is bidirectional.

Detailed explanation-4: -The phloem transports food material from leaves to other parts of the plant body. It can conduct food in both directions.

There is 1 question to complete.