Question

what is the difference between self pollination and cross pollination.describe the process of double fertilization in plants

Answer 1

Cross Pollination

The cross pollination is defined as deposition of pollen grains from a flower to the stigma of another flower. Commonly, the process is done pollinators that are insects and wind. By insects the process take place in several plants like tulips, grapes, plums, apples, pears, strawberries, daffodils, raspberries and others. While, by wind for different grasses, maples trees, dandelions, catkins, and others.

Self Pollination

In this process, the pollen grains transfer from stigma of the same or genetically similar flower. The self pollination can be seen in legumes like sunflowers, orchids, peanuts, oats, peas, potatoes, wheat, peaches, and more.




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Answer 2

in the flowering plants after reaching the stigma of the female flower the pollen grains germinate sendsout a Pollen tube Vicky Goes through stigma and style to reach the ovule present in the ovary the Pollen tube enters a view to a small opening called micropile where it releases to male gametes one male gamete fuses with egg to form zygote this is called syngamy The Other male gamete fuses with two non polar nuclei to form the nutritive tissue called the endosperm Dus there are 2 fusion occurring inside the ovule this type of fertilization is a characteristic of flowering plants and is termed as double fertilization