Sexual Reproduction in flowering plants

Reproduction in flowering plant -1 important points from previous year exam papers neet,aiims

R Camerarius was the first to describe sexual reproduction in plants. The flower is the main reproductive part of the angiospermic plants. In which, pollen grain is male gametophyte and embryo sac is female gametophyte. The process of sexual reproduction is divided into three steps: Pre-fertilisation Double fertilization Post-fertilization Pre-Fertilization events in sexual reproduction in flower Important events of … Read moreSexual Reproduction in flowering plants

These seven Enzymes are base of Genetic Engineering.

Genetic engineering is the process in which the new DNA  manually added to an organism. Important enzymes involved in genetic engineering are:- Exonuclease The enzymes act upon genome and digest the base pairs on 5′ and 3′ ends of a single-stranded DNA or at single-strand nicks or gaps in double-stranded DNA. Endonucleases Endonuclease acts upon the … Read moreThese seven Enzymes are base of Genetic Engineering.

Difference between SER (smooth endoplasmic reticulum) and RER (rough endoplasmic reticululm)

Garnier for the first time had described them as filamentous structure, ergastoplasm. They were first discovered by Claude (1951) under the electron microscope. The term ‘endoplasmic reticulum‘ was first coined by Porter et.al in 1945.E.R. is abundant in liver, pancreas and other actively synthesizing cells. E.R. is absent in RBC, ova, embryonic cells and prokaryotes. There … Read moreDifference between SER (smooth endoplasmic reticulum) and RER (rough endoplasmic reticululm)

Self and Cross pollination are totally different or have some similarity?

The transfer of pollen grains from the anther to the stigma is called pollination. It is of two types:- 1. Self-pollination (autogamy) When the pollen grains of a flower falls on the stigma of the same flower, or of the different flower of the same plant, it is called self-pollination. It occurs not only in … Read moreSelf and Cross pollination are totally different or have some similarity?