Figure 30.7 Which layers of the stem are made of parenchyma cells?
- cortex and pith
- epidermis
- sclerenchyma
- epidermis and cortex
Introduction:
Parenchyma cells are one of the most common cells found in plants that presents in most of its part as in stem, root, inside leaf, pulp of the fruit etc. these parenchyma cells responsible for metabolic functions like photosynthesis etc.
Answer to Problem 1VCQ
Correct answer: Option (a), cortex and pith is correct answer.
Explanation of Solution
Explanation/justification for the correct answer:
Option (a) cortex and pith. The cortex and pith in central and outer respectively of the stem are made up of parenchyma cells of the plant. Cortex is the outer layer and pith is the central one that is bounded between epidermis and endodermis.
Explanation for incorrect answer:
Option (b), epidermis. Epidermis is the dermal tissue of the plant. It is a single layer of cells that covers and protects the underlying tissues. So, it is an incorrect answer.
Option (c), sclerenchyma. These cells provide support to the plant but most of them are dead on maturity. These cells having secondary cell wall that is thickened with the deposit of lignin. So, it is an incorrect answer.
Option (d) epidermis and cortex. Epidermis is the dermal tissue that is to protect and covers the underlying tissues, while the cortex is one of the parenchyma cells. So, it is an incorrect answer.
The layers of stem which are made up of parenchyma cells are cortex and pith. Hence, option (a) is the correct answer.
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Chapter 30 Solutions
Biology 2e
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