In a mature two celled pollen

Options

A. The generative cell is smaller with dense cytoplasm,
B. The exine is sculptured and continuous
C. The intine is discontinuous and made up of cellulose and pectin
D. The vegetative cell is bigger with abundant food reserve and has spindle shaped nucleus

Answer

**Step-by-Step Solution:**

1. **Understanding Pollen Structure**: A mature two-celled pollen grain consists of two distinct cells: the vegetative cell and the generative cell. The vegetative cell is larger and contains abundant food reserves, while the generative cell is smaller and has dense cytoplasm.

2. **Evaluating the First Statement**: The first statement claims that the generative cell is smaller with dense cytoplasm. This is correct because the generative cell is indeed smaller compared to the vegetative cell and has a denser cytoplasmic content.

3. **Evaluating the Second Statement**: The second statement suggests that the exine (the outer layer of the pollen grain) is sculptured and continuous. This statement is incorrect. While the exine is sculptured, it is not continuous due to the presence of germ pores, which are areas where the exine is absent.

4. **Evaluating the Third Statement**: The third statement mentions that the intine (the inner layer of the pollen grain) is discontinuous and made up of cellulose and pectin. This statement is somewhat misleading. The intine is indeed made of cellulose and pectin, but the term "discontinuous" is not typically used to describe it in this context.

5. **Evaluating the Fourth Statement**: The fourth statement asserts that the vegetative cell has a spindle-shaped nucleus. This is incorrect. The vegetative cell does have a larger size and abundant food reserves, but it does not have a spindle-shaped nucleus; this characteristic is associated with the generative cell.

6. **Conclusion**: After evaluating all the statements, the only correct statement is the first one regarding the generative cell being smaller with dense cytoplasm. Therefore, the correct answer to the question is the first statement.

**Final Answer**: The correct statement regarding a mature two-celled pollen grain is: "The generative cell is smaller with dense cytoplasm."

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