Here students can locate TS Inter 1st Year Botany Notes 6th Lesson Modes of Reproduction to prepare for their exam.
TS Inter 1st Year Botany Notes 6th Lesson Modes of Reproduction
→ The ability of an organism to produce a new generation of individuals of the same species is called Reproduction.
→ Reproduction can be broadly grouped into asexual reproduction and sexual reproduction.
→ Sexual reproduction produce new characters in the off spring so that survival advantage is enhanced.
→ Panchanan Maheswari
- Ptmchanan Maheswari is one of the distinguished botanists not only of India but of the entire world.
- He worked on embryological aspects and popularised the me of embryological characters in taxonomy.
- His work on test tube fertilisation and intra – ovarian pollination won world wide acclaim.
→ The period from birth to the natural death of an organism represents its life.
→ Reproduction is defined as a biological process in which an organism gives rise to young ones similar to itself.
→ The organism’s habitat, its internal physiology and several other factors are collectively responsible for how it reproduces.
→ There are two types of reproduction-Asexual and Sexual methods.
→ In asexual method of reproduction, a single individual is capable of producing offspring.
→ In asexual method, the offsprings produced are not only identical to one another but also exact copies of their parent.
→ In unicellular organisms, asexual reproduction is done by binary fission or : budding.
→ In algae, and fungi asexual reproduction is done by spores.
→ In Bryophytes and Pteridophytes the spores produced are haploid.
→ In higher plants asexual reproduction is done by vegetative propagation.
→ In flowering plants vegetative propagation is done by runner, stolon, sucker, offset, rhizome, corm, tuber, bulb, bulbil, reproductive leaves etc.
→ Plants produced vegetatively or asexually are called clones.
→ Sexual reproduction involves formation of the male and female gametes, either by the same individual or by different individuals of the opposite sex.
→ Offsprings formed by sexual reproduction are not identical to the parents or : among themselves.
→ In plants hormones are responsible for sexual reproduction.
→ Events in sexual reproduction are prefertilisation, fertilisation and post fertilisation.
→ Gametogenesis refers to the process of formation of male and female gametes.
→ The fusion of male and female gametes results in diploid zygote. This is known as syngamy or fertilisation.
→ Embryogenesis refers to the process of development of embryo from tha zygote.
→ In flowering plants after fertilisation ovary develops into fruit and ovules mature into seeds.