AP BIOLOGY

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PLANTS

PLANT TISSUE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is true about collenchyma tissues?A) Cells of this tissue are alive at maturity.B) Have thin primary cell wallC) Have unevenly thickness of secondary cell wallD) Loosely packed and have many intercelullar spaces between cells
A
A and B
B
A, C and D
C
A, B and C
D
all the above
Explanation: 

Detailed explanation-1: -Collenchyma cells are elongated with unevenly thickened walls. Sclerenchyma cells are rigid, non-living cells. They have thick, lignified secondary walls and lack protoplasts at maturity. So, the correct answer is option A.

Detailed explanation-2: -So, the correct answer is ‘Collenchyma occurs in layers below epidermis in dicotyledonous plants. ‘

Detailed explanation-3: -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-4: -Collenchyma is living tissue. Similar cells make up their structure. A strong primary cell wall consisting of cellulose and pectin makes up the only component of collenchyma cells, which are often alive cells.

Detailed explanation-5: -Collenchyma is a cellular tissue that, along with parenchyma, composes the bulk of plant tissues. Like parenchyma, collenchyma cells are living cells. They have cellulose cell walls and are filled with water – which helps the plants to keep their shape.

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