Endosperm is formed in angiosperms due to double fertilization . It is , however, absent in certain seeds due to lack of

Options

A. Certain enzymes
B. Growth hormone
C. Dicotyledonous hormone
D. Nutrients

Answer

**Step-by-Step Solution:**

1. **Understanding Double Fertilization**: In angiosperms, double fertilization is a unique process where one male gamete fertilizes the egg to form the zygote (syngamy), while the other male gamete fuses with the two polar nuclei in the central cell of the embryo sac to form the primary endosperm cell (triple fusion).

2. **Formation of Endosperm**: The primary endosperm cell divides and develops into the endosperm, which serves as a food reserve for the developing embryo.

3. **Absence of Endosperm in Certain Seeds**: In some seeds, the endosperm is absent. This absence can be attributed to various factors, but the question specifically asks about a lack of a particular component.

4. **Identifying the Component**: Among the options provided (certain enzymes, growth hormone, diacotylidinous hormone, nutrients), the absence of endosperm in certain seeds is primarily due to a lack of growth hormone.

5. **Conclusion**: Therefore, the correct answer to the question is that endosperm is absent in certain seeds due to the lack of growth hormone.

**Final Answer**: The correct answer is growth hormone.

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