AP BIOLOGY

PLANTS

PLANT TISSUE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following is similar in structure to parenchyma cells except they have thicker primary walls that are capable of giving exceptional strength to young actively growing organs of a plant?
A
Meristems
B
Permanent tissues
C
Sclerenchyma cells
D
Collenchyma cells
Explanation: 

Detailed explanation-1: -COLLENCHYMA. Collenchyma tissues are composed of prismatic cells that are commonly elongated and can occur in long strands or cylinders. Like parenchyma cells, collenchyma is living at maturity.

Detailed explanation-2: -Collenchyma-Are similar to parenchyma cells with thicker cell walls. They are meant to provide mechanical support to the plant structure in parts such as petiole of the leaf.

Detailed explanation-3: -Structure of Parenchyma Cells: Parenchyma in plant cells is either polyhedral or isodiametric in shape. They can also be oval, polygonal, elongated, or round. Such cells are packed tightly or may have limited intercellular space. They are built up of a thin cell wall that is mainly composed of cellulose, hemicellulose.

Detailed explanation-4: -Explanation: Parenchymatous tissues have intercellular spaces is a wrong statement. Parenchyma act as a packing tissue in plants hence they do not have intercellular spaces. Collenchymatous tissues have intercellular spaces.

There is 1 question to complete.