The outermost and innermost wall layers of microsporangium in an
anther are respectively:
a. Endothecium and tapetum
b. Epidermis and endodermis
c. Epidermis and middle layer
d. Epidermis and tapetum
NCERT Class XII
Biology - Main Course Book
Chapter 2. Sexual Reproduction in Flowering Plants
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(d) is the answer........
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Answer:
Outermost and innermost wall layers of microsporangium in an Epidermis and tapetum
Option D
Explanation:
In case of flowering plants, the microsporangium consists of 4 different layers of varying thickness, structure, morphology and varying function. They include the epidermis which lies the most outward. Their function is the protection of the microsporangium.
Inner to that is endothecium. This consists of two layers. These are fibrous. They give rigidity to the microsporangium. Inner to that is the tapetum. The tapetum is important because they help in storage of nutrients.
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