Reproduction is vital in animals and plants for the continuation of life by the production of offsprings. The time required to reproduce also varies from organism to organism. In AP class 10 biology chapter 6 Reproduction, we shall study reproduction in animals and plants in a detailed way.
What is Reproduction?
Reproduction is the biological process by which new organisms are produced. It is important for perpetuation and continuation of life. Reproduction is classified into two types based on the fusion of gametes as follows:
- Sexual Reproduction
- Asexual Reproduction
A few examples of asexual reproduction are:
Sexual reproduction in higher animals happens through specialised organs, distinctively male and female reproductive systems. The figure of male and female reproductive organs are given below
Image 6.1 Female Reproductive Organ
Image 6.2 Male Reproductive Organ
Cell division occurs to enhance the growth of the individual to repair and replace the worn out cells and also for the formation of gametes. There are two types of cell division as follows:
In the next section, let us look at a few answered chapter questions to better understand the concepts discussed in the chapter.
Class 10 Biology Chapter 6 Reproduction Questions
- Explain the process of fertilisation in plants
- The pollen grains are received by the stigma.
- The received pollen grains germinate and give rise to pollen tubes. Only one pollen tube reaches the embryosac. This pollen tube is comprised of two male nuclei, which migrate to the tip of the pollen tube at the time of fertilization.
- The pollen tube grows downward and enters the ovule through micropyle and discharges the two male gametes into the embryo sac.
- One of the male gametes fuses with an egg to form a zygote which is diploid in nature. This is known as the first fertilisation
- The other male nucleus (gamete) fuses with the secondary nucleus (2n) to form the endosperm nucleus that is triploid in nature. This is known as the second fertilization in the embryo sac.
- Hence, double fertilisation occurs in embryosac which is unique in flowering plants.
- What is the job of the amniotic sac?
Solution: The job of the amniotic sac is to keep the embryo soft and protect it from mechanical injuries.
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