Question

Of the four plants (A, B, C and D) observed, A was selected by Mendel for his hybridization experiments, while in B shall found inbreeding depression and it is a day neutral plant. In C, Hugo de Vries discovered mutations. D has bicollateral vascular bundles and straight embroyoes. Identify the characters of A, B, C and D in correct order.
The correct order is

• A. Pulvinus leaf base, kranz anatomy, incarpellary gynoecium, septicidal capsule
• B. Foliaccous stipules, scutellum, tetracarpellary gynoecium, septifragal placenta
• C. Piston mechanism, eustele, monocarpellary gynoecium, swollen placenta
• D. Monadelphous stamens, still roofs, bicarpellary gynoecium, unilocular ovary

Answer 1

The correct option is A Pulvinus leaf base, kranz anatomy, incarpellary gynoecium, septicidal capsule

Pulvinus leaf base is a thickening at the base of the leaf that can change the position of the growing leaf. It is a joint like thickening which grows because of loss of water. This is a unique trait found in some plants. So, it was selected by Mendel for his hybridization experiments. Kranz anatomy is a special type of anatomy practiced by the plants which are neutral during the day as their vascular bundles are covered by two types of cell structures to avoid photo-respiration. Intercapillary gynoecium is an abnormal condition caused because of mutation. By collateral vascular bundles and the straight embryo is a condition found in septicidal capsules where the capsule divides at the septa during dehiscence of the dried fruit.
Therefore, the correct answer is option A.