AP BIOLOGY

PLANTS

PLANT TISSUE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following cells or features are not found in the phloem tissue
A
sieve-tube elements
B
sieve plates
C
companion cells
D
perforation plates
E
Sieve tube cell
Explanation: 

Detailed explanation-1: -Phloem tissue consists of two types of cells, sieve tubes and companion cells and both have perforated cell walls. Tracheids cells do not have perforated cell walls. So, the correct answer is option (A) Tracheids.

Detailed explanation-2: -Final Answer: Tracheids do not have perforated cell walls.

Detailed explanation-3: -Hence, tracheids are not an element of phloem tissue, so the correct option is (1) Tracheids.

Detailed explanation-4: -As we already mentioned, companion cells have plasmodesmatal connection with sieve tubes and plasmodesmatal connection itself means they have pores in the cell wall. So, companion cells have perforated cell walls.

There is 1 question to complete.