Home
Class 12
BIOLOGY
In the typical embryo sac, the nuclei ar...

In the typical embryo sac, the nuclei are arranged as

A

`3+2+3`

B

`3+3+2`

C

`2+3+3`

D

`2+4+2`

Text Solution

AI Generated Solution

The correct Answer is:
To answer the question about the arrangement of nuclei in a typical embryo sac, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding the Structure of the Embryo Sac**: - The embryo sac is a structure found in angiosperms (flowering plants) that contains the female gametes. - It has two ends: the chalazal end and the micropilar end. 2. **Identifying the Components**: - At the **chalazal end**, there are **three antipodal cells**. - At the **micropilar end**, there are **three cells**: **two synergids** and **one egg cell**. - In the center of the embryo sac, there is a **central cell** which contains **two polar nuclei**. 3. **Counting the Nuclei**: - Antipodal cells: 3 nuclei - Synergids: 2 nuclei - Egg cell: 1 nucleus - Polar nuclei in the central cell: 2 nuclei - Total nuclei = 3 (antipodals) + 2 (synergids) + 1 (egg) + 2 (polar) = **8 nuclei**. 4. **Arranging the Nuclei**: - The arrangement can be summarized as: - 3 antipodal cells - 2 polar nuclei - 3 cells at the micropilar end (2 synergids + 1 egg cell) - Thus, the arrangement of nuclei can be expressed as **3 + 2 + 3**. 5. **Choosing the Correct Option**: - Based on the arrangement, the correct option is **3 + 2 + 3**. ### Final Answer: The nuclei in a typical embryo sac are arranged as **3 antipodal cells, 2 polar nuclei, and 3 cells at the micropilar end (2 synergids + 1 egg cell)**, making the total arrangement **3 + 2 + 3**. ---
Promotional Banner

Similar Questions

Explore conceptually related problems

A typical embryo sac is

A trpical embryo sac is

Embryo sac is

Embryo sac is

An embryo sac has:

A typical enbryo sac is 8-nucleate and :

Oenothera type embryo sac is:

In tetrasporic embryo sac, the endosperm is:

In an embryo sac, the largest cell is

In Capsella, embryo sac is