All organisms reproduce to and to ensure survival of the species prevent the species becoming extinct. Fertilisation occurs when the nucleus of the sperm cell and the nucleus of the egg cell fuse. Sexual reproduction: In plants: Pollen grains are transferred from the anther of one plant to the stigma of another plant. Some plants are pollinated by insects (like bees) and birds but other plants are pollinated by the wind. In animals: – Internal Fertilisation when fertilisation happens inside the female’s body. External Fertilisation – when fertilisation happens outside the female’s body. Asexual Reproduction: New plants are produced from a single parent without involving sex New plants that are genetically identical to one another and to their parent plant are called a clone. of asexual reproduction in plants – Bulbs plant produces leaf bases, swollen with stored food, e.g. daffodils. Runners – produces side shoots e.g. spider plant, strawberries. – Tubers produces underground storage organs e.g. potatoes. Advantages for sexual reproduction:
All organisms reproduce to ensure survival of the species and to prevent the species becoming extinct. Fertilisation occurs when the nucleus of the sperm cell and the nucleus of the egg cell fuse. Sexual reproduction: In plants: Pollen grains are transferred from the anther of one plant to the stigma of another plant. Some plants are pollinated by insects (like bees) and birds but other plants are pollinated by the wind. In animals: Internal Fertilisation – when fertilisation happens inside the female’s body. External Fertilisation – when fertilisation happens outside the female’s body. Asexual Reproduction: New plants are produced from a single parent without involving sex New plants that are genetically identical to one another and to their parent plant are called a clone. of asexual reproduction in plants Bulbs – plant produces leaf bases, swollen with stored food, e.g. daffodils. Runners – produces side shoots e.g. spider plant, strawberries. Tubers – produces underground storage organs e.g. potatoes. Advantages for sexual reproduction: