Chromosome number in endosperm cell of plant a and in the root apical meristem cell of plant b together equal to chromosome number in shoot apical meristem cell of apple. Plants a and b respectively are

Options

A. Maize, Haplopappus
B. Rice, Potato
C. Rice, Haplopappus
D. Rice, Maize

Answer

To solve the question, we need to find two plants (Plant A and Plant B) such that the chromosome number in the endosperm cell of Plant A and the root apical meristem cell of Plant B together equal the chromosome number in the shoot apical meristem cell of an apple plant.

### Step-by-Step Solution:

1. **Identify the Chromosome Number of Apple:**
- The chromosome number in the shoot apical meristem cell of an apple is given as 34 (2n = 34).

2. **Understand the Chromosome Composition:**
- In plants, the endosperm is typically triploid (3n) in dicots.
- The root apical meristem cells are diploid (2n).

3. **Set Up the Equation:**
- Let the chromosome number in the endosperm of Plant A be represented as 3n.
- Let the chromosome number in the root apical meristem of Plant B be represented as 2n.
- According to the problem, we have the equation:
\[ 3n_A + 2n_B = 34 \]

4. **Analyze Possible Plants:**
- We need to find plants A and B that satisfy this equation.
- From the video transcript, we learn that:
- For maize (Plant A), 2n = 20, thus 3n = 30.
- For haplopappus (Plant B), 2n = 4.

5. **Calculate the Total:**
- Substitute the values into the equation:
\[ 30 (from maize) + 4 (from haplopappus) = 34 \]
- This satisfies the equation perfectly.

6. **Conclusion:**
- Therefore, Plant A is maize and Plant B is haplopappus.

### Final Answer:
- Plant A is maize and Plant B is haplopappus.