Eucaryotic cells which contain very little of E.R. are

Options

A. Early embryonic cells
B. Ova
C. Resting cells
D. All the above

Answer

To answer the question "Eukaryotic cells which contain very little of E.R. are," we will analyze the options provided and understand the characteristics of each type of cell mentioned.

### Step-by-Step Solution:

1. **Understanding Endoplasmic Reticulum (E.R.):**
- The endoplasmic reticulum is a membrane-bound organelle found in the cytoplasm of eukaryotic cells.
- It plays a crucial role in the synthesis, modification, and packaging of proteins (rough E.R.) and in lipid synthesis (smooth E.R.).

2. **Analyzing the Options:**
- **Option 1: Early Embryonic Cells**
- Early embryonic cells are in the initial stages of development. During this phase, they undergo rapid cell division and have minimal organelle development, including the endoplasmic reticulum.

- **Option 2: Ova (Egg Cells)**
- Ova, or egg cells, are specialized cells that store nutrients and genetic material. They typically have a reduced amount of endoplasmic reticulum compared to other cell types, as their primary role is to provide resources for early development once fertilization occurs.

- **Option 3: Resting Cells**
- Resting cells, or quiescent cells, are in a non-dividing state. These cells often have lower metabolic activity and may contain less endoplasmic reticulum as they are not actively synthesizing proteins or lipids.

3. **Conclusion:**
- All three types of cells mentioned (early embryonic cells, ova, and resting cells) contain very little endoplasmic reticulum. Therefore, the correct answer is that all of the above options are correct.

### Final Answer:
The eukaryotic cells which contain very little of E.R. are all of the above: early embryonic cells, ova, and resting cells.

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