A mass of tissue in a ovule conatining abundant reserve food material enclosed by integuments is

Options

A. endosperm
B. hilum
C. nucellus
D. micropyle

Answer

To answer the question "A mass of tissue in an ovule containing abundant reserve food material enclosed by integuments is," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of an Ovule**:
- An ovule is a structure found in seed plants that develops into a seed after fertilization. It consists of several parts including the funicle, hilum, micropyle, integuments, nucellus, and chalaza.

2. **Identify the Components**:
- The integuments are the outer layers that protect the ovule. There are typically two integuments: an outer integument and an inner integument.

3. **Locate the Tissue in Question**:
- The question refers to a mass of tissue within the ovule that contains abundant reserve food material. This tissue is located inside the integuments.

4. **Recognize the Function of the Tissue**:
- The tissue that fits this description is the nucellus. The nucellus serves as the main tissue of the ovule and is responsible for providing nourishment to the developing embryo sac.

5. **Confirm the Presence of Reserve Food Material**:
- The nucellus contains a significant amount of reserve food material, which is essential for nourishing the embryo sac during its development.

6. **Eliminate Incorrect Options**:
- Other options such as endosperm and polar nuclei do not fit the description. The endosperm is formed after fertilization and is not present in the ovule before fertilization.

7. **Conclude the Answer**:
- Based on the analysis, the correct answer to the question is the **nucellus**.

### Final Answer:
The mass of tissue in an ovule containing abundant reserve food material enclosed by integuments is the **nucellus**.

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