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In tenuinucellate ovules, the nucellus m...

In tenuinucellate ovules, the nucellus may break down. The nourishment is then provided by

A

Hypostase

B

Epistase

C

Endothelium

D

Arillode.

Text Solution

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The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding Tenuinucellate Ovules**: In tenuinucellate ovules, the nucellus is a tissue that typically provides nourishment to the developing embryo sac. However, in some cases, this nucellus may break down. 2. **Role of the Nucellus**: The primary function of the nucellus is to supply nutrients to the developing embryo. When it breaks down, the source of nourishment needs to be identified. 3. **Identifying Alternative Nourishment Source**: When the nucellus is no longer available, the nourishment for the developing embryo sac is taken over by another tissue. This tissue is known as the endothelium. 4. **Location of Endothelium**: The endothelium is located between the integuments of the ovule and the inner epidermis. It acts as a substitute for the nucellus in providing nourishment. 5. **Conclusion**: Therefore, in tenuinucellate ovules where the nucellus has broken down, the nourishment is provided by the endothelium tissue. **Final Answer**: The nourishment is provided by the endothelium. ---
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