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Class 12 biology textbook Solutions for Class 12, Biology Chapter 1 Reproduction in Lower and Higher Plants Maharashtra state board are delivered here with simple step-by-step detailed explanations.
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Reproduction in Lower and Higher Plants Notes PDF- Short Notes
- Reproduction is the production of young ones like parents.
- Essential Process related to continuity of species.
- To maintain continuity of life, organisms produce offspring showing similar characteristics.
- TWo types – Asexual reproduction and Sexual reproduction.
- Fusion of two compatible gametes or sex cells is not involved.
2. Production of genetically identical progeny, i. e. Clones.
3. Progeny from a single organism.
4. Inheritance of genes of a parent by progeny.
5. Modes of Asexual Reproduction
- Multicellular organism
- Small piece
- Accidental breaking E.g. Algae Spirogyra.
- Unicellular organism
- One or more outgrowths, i.e. buds
- E.g. Yeast
(3) Spore formation
- Different types
- Flagellated motile zoospores
- Biftagellate zoospores. E.g. Chlamydomonas
Binary Fission E.g. Amoeba, Paramoecium
(5) Conidia formation
E.g. Fungus Penicillium
(6) Gemmule formation
Small piece of plant part selected.
Must possess one or more bud.
- Stem cutting
e.g. Rose, Bougainvillea
- Leaf cutting
e.g. Sansev feria
- Root cutting
- Joining of two plant parts stock and scion
- Rooted plant — Stock
- Joined plant – Scion
- Grow together as one plant
- Stem grafting e.g. Apple
- Bud grafting, budding e.g. Rose
(3) Tissue Culture
- A small amount of plant tissue is carefully and aseptically grown to get plantlets.
- Micropropagation — Modern method to get plants from tissue culture. e.g. Orchids
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