Science
A banana plant is growing with the help of suckers. These suckers are small plant stem outgrowths which can be separated from the main plant and planted separately and they will grow into a new plant subsequently.
(a) Give the name and type of reproduction.
(b) List two advantages the farmer will have on using the type of reproduction mentioned above.
(c) The above plant produces only male flower. Explain how this plant will be involved in the process of pollination.
(d) Why is the offspring of this banana plant not absolutely identical to its parent plant?
Reproduction in Plants
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Answer
(a) The name of reproduction shown in the image is vegetative propagation by suckers and it is a type of asexual reproduction.
(b) The advantages of using this method of reproduction are :
- Quick and uniform propagation : A large number of banana plants can be produced in a shorter time and all offspring show similar characteristics as the parent plant.
- Assured fruit quality : Since the new plants are genetically similar to the parent, they retain all desirable traits such as good taste, size, and disease resistance of the original plant.
(c) The banana plant shown produces male flowers, which contain pollen grains. During pollination, these pollen grains from anther are transferred (by wind, water, or insects) to the stigma of female flowers of another banana plant. This helps in the process of sexual reproduction, allowing the fusion of male and female gametes.
(d) The offspring of this banana plant is not absolutely identical to its parent plant because during pollination, minor DNA/genetic variations can occur due to mutations or environmental influences during cell division and these small differences make the new plant slightly different from the parent.
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The image below shows a banana plant which is growing with the help of suckers. These suckers are small plant stem outgrowths which can be separated from the main plant and planted separately and they will grow into a new plant subsequently.
(a) Give the name and type of reproduction that is shown in the image above.
(b) List two advantages the farmer will have on using the type of reproduction mentioned above.
(c) The above plant produces male flowers. Explain how this plant will be involved in the process of pollination.
(d) Why is the offspring of this banana plant not absolutely identical to its parent plant?
The image below shows a developing fetus in the mother's womb. The developing fetus is connected to the placenta by means of umbilical cord. The Umbilical vein and artery run inside the umbilical cord.
(a) Name two substance that moves through the blood vessels.
(b) If the placenta has less villi how will it affect the baby’s growth?
(c) Name the region where the embryo develops inside the female body. Explain how this region is adapted for nourishing the baby.
(d) Some of the fetal cells fall off into the amniotic fluid and can be collected by careful procedure. The cells were screened and found to contain XY chromosome.
(i) What is the sex of the foetus?
(ii) How is this prenatal sex determination misused?A developing fetus is connected to the placenta by means of umbilical cord. The Umbilical vein and artery run inside the umbilical cord.
(a) Name two substance that moves through the blood vessels.
(b) If the placenta has less villi how will it affect the baby’s growth?
(c) Name the region where the embryo develops inside the female body. Explain how this region is adapted for nourishing the baby.
(d) Some of the fetal cells fall off into the amniotic fluid and can be collected by careful procedure. The cells were screened and found to contain XY chromosome.
(i) What is the sex of the foetus?
(ii) How is this prenatal sex determination misused?