| List-I (Taxon) | List-II (Number of chromosomes in the endosperm cells) |
| A. Pisum sativum | 1. 72 |
| B. Oryza s-ativa | 2. 24 |
| C. Nicotiana tabacum | 3. 60 |
| D. Allium cepa | 4. 36 |
| 5. 21 |
A) A-5 B-4 C-1 D-2
B) A-2 B-5 C-3 D-1
C) A-1 B-2 C-5 D-4
D) A-4 B-1 C-2 D-5
Correct Answer: A
Solution :
In angiosperms, endosperm is a triploid structure it is formed due to fusion of second male gamete (n) with the secondary nucleus (2n). All the given taxon are belong to angiospermic group, hence, their endosperms will contain three sets of their haploid number of chromosomes (3n). Pisum sativum (n = 7) will contain endosperm with 21 (3n) chromosomes. Oryza saliva (n=12) will contain endosperm with 36 (3 n) chromosomes. Nicotiana tabacum (n=24) will contain endosperm with 72 (3n) chromosomes and Allium sepa (n=8) will contain endosperm with 24 (3n) chromosomes.
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