The diploid and triplod product of double fertilization resecitvely are

Options

A. zygote and primary endosperm nucleus
B. endosperm and cotyledons
C. embryo and perisperm
D. zygote and scutellum

Answer

To answer the question regarding the diploid and triploid products of double fertilization, we can break down the process step by step:

### Step-by-Step Solution:

1. **Understanding Double Fertilization**:
- Double fertilization is a unique process in flowering plants where two fertilization events occur within the ovule.

2. **Entry of Pollen**:
- Pollen grains land on the stigma of the flower and grow a pollen tube that penetrates the ovule through the micropyle.

3. **Fertilization of the Egg Cell**:
- One of the sperm cells from the pollen grain fertilizes the egg cell, which is haploid (n). This fusion results in the formation of a zygote.
- The zygote is diploid (2n) because it contains genetic material from both the sperm and the egg.

4. **Fertilization of the Polar Nuclei**:
- The second sperm cell fuses with the two polar nuclei present in the central cell of the ovule. The polar nuclei are also haploid (n).
- This fusion results in a triploid (3n) nucleus known as the primary endosperm nucleus.

5. **Formation of Endosperm**:
- The primary endosperm nucleus (3n) will develop into the endosperm, which serves as the nutritive tissue for the developing embryo.

### Final Answer:
- The diploid product of double fertilization is the **zygote (2n)**, and the triploid product is the **primary endosperm nucleus (3n)**.