Explanation:
Definition:
- Asexual reproduction is a type of reproduction that does not involve the fusion of gametes (sperm and egg) and results in offspring that are genetically identical to the parent plant.
- Sexual reproduction, on the other hand, involves the fusion of gametes and results in offspring that have a combination of genetic material from both parents.
Answer:
The correct answer is C: Apomixis
Explanation:
- In many plants, sexual reproduction can be replaced by asexual reproduction through a process called apomixis.
- Apomixis is a form of asexual reproduction where seeds are produced without fertilization or the formation of embryos.
- In apomixis, the ovule develops into a seed without being fertilized by pollen.
- This can happen through different mechanisms, such as the development of an embryo from a diploid cell in the ovule or the formation of a seed directly from the ovule without the involvement of meiosis.
- Apomixis allows plants to reproduce without the need for pollination and the production of seeds with genetic variation.
- It is a common mode of reproduction in some plant species, such as dandelions and daisies.
Other options:
- A: Semigamy: This term is not used to describe the replacement of sexual reproduction by asexual reproduction in plants.
- B: Apospory: Apospory refers to the development of a sporophyte directly from a gametophyte without the formation of spores. It is not specifically related to the replacement of sexual reproduction by asexual reproduction.
- D: Amphimixis: Amphimixis is another term for sexual reproduction, involving the fusion of gametes. It is the opposite of asexual reproduction.
Therefore, the correct answer is C: Apomixis.