Distinguish between pollination and fertilisation. Mention the site and product of fertilisation in a flower. Draw a neat, labelled diagram of a pistil showing pollen tube growth and its entry into the ovule.
OR

Reproduction is essentially a phenomenon that is not for survival of an individual but for continuation of a species. Justify

Question

Distinguish between pollination and fertilisation. Mention the site and product of fertilisation in a flower. Draw a neat, labelled diagram of a pistil showing pollen tube growth and its entry into the ovule.
OR

Reproduction is essentially a phenomenon that is not for survival of an individual but for continuation of a species. Justify

Philoid · Accepted Answer

Pollination is the process of transfer of pollen grains from anther to the stigma of the carpel by various pollinating agents like wind, insects etc. Whereas the process of mixing of male and female gametes to form a zygote is called fertilization. The site of fertilization is inside embryo sac which is present within ovary. The product of fertilization is a zygote.

OR

For an organism to survive it has to perform various life processes like nutrition, respiration, circulation, excretion etc. Reproduction is not required for survival of an organism. During reproduction there is replication of DNA and only genetic material is transferred from one generation to the next producing certain variations in the offsprings. This process helps in maintaining the continuity of a species.