Question

Identify the wrong pair of statements.
I) The number of stamens in 5 flowers of Allium is equal to those in 5 flowers of Solanum.
II) The microsporangia of Hibiscus and Asparagus are having 80 pollen grains each. Then the ratio of the number of pollen grains produced from each stamen of these two plants is 1: 1.
III) The ratio of the number of stamens in the flowers of Pisum and Datura is 2: 1.
IV) The number of carpels in a flower of Smilax is equal to the number of carpels in a cyathium inflorescence.

• A. III, IV
• B. I, IV
• C. I, II
• D. II, III

Answer 1

The correct option is C I, II

The number of stamens in Allium is 6 and number of stamens in Solanum is 5. For the 5 flowers of Allium and 5 flowers of Solanum the stamen number is of 30 and 25. Therefore the first statement is wrong.

For the second statement, here the pollen grains are formed by diploid(2n) microspore mother cells are housed in the anther and divide by meiosis to form four haploid (n) microscopes. Each microspore develops by mitosis into pollen grains. Hibiscus is a dicot. Dicot flower part such as petals and stamens are produced in multiples of fours and fives whereas the stamen number of Asparagus is 6. Therefore, the pollen grains produced from each stamen of these two plants is never same.

Then the third statement consist of the number of stamens in Pisum and datura is 2: 1, because total it consists of 10:5.

The fourth statement shows similarities in some plants of both smilax and cyathium but not all.

So, the correct answer is option C.