Question

C. Differentiate between following pairs of terms: 1. Self-pollination and Cross-pollination 2. Calyx and Corolla 3. Androecium and Gynoecium 4. Anther and Stigma​

Answer 1

Christian Konrad Sprengel first identified the process of pollination in the 18th century.

There are two types of pollination -:

Self-pollination

self pollination

Cross-pollination

cross pollination

Cross-Pollination

The cross-pollination is defined as the deposition of pollen grains from a flower to the stigma of another flower. Commonly, the process is done by insects and wind. By insects, the process takes place in several plants like strawberries, grapes, raspberries, tulips, apples, plums, pears, daffodils, and more. Pollination by the wind is observed in different grasses, maples trees, dandelions and catkins.

Self Pollination

In this process, the pollen grains transfer from the stigma of the same or genetically similar flower. Self-pollination can be observed in legumes such as orchids, sunflowers, peas, peanuts, oats, peaches, potatoes, wheat, and others.

Answer 2

1. a. Self Pollination is a type of pollination in which the pollen grains from the male reproductive part of the flower (stamen) transfer to the female reproductive part of another flower (pistil).

b. Cross Pollination is a type of pollination in which the pollen grains from the stamen transfer to pistil in the same flower.

4. Anther is a top part of the stamen male reproductive part of the flower and Stigma is the top part of the pistil female reproductive part of the flower.