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Life begin in all sexually reproducing o...

Life begin in all sexually reproducing organisms as a

A

single-celled zygote

B

double-celled zygote

C

haploid zygote

D

haploid gametes.

Text Solution

AI Generated Solution

The correct Answer is:
### Step-by-Step Solution: 1. **Understanding Sexual Reproduction**: Sexual reproduction involves the fusion of male and female gametes. The male gamete (sperm) and the female gamete (egg) come together during a process called fertilization. 2. **Fertilization Process**: During fertilization, the sperm and egg unite to form a zygote. This is a crucial step in sexual reproduction as it marks the beginning of a new organism's life. 3. **Formation of Zygote**: The zygote is the initial cell formed when the male and female gametes fuse. At this stage, the zygote is a single-celled structure. 4. **Development of the Zygote**: After its formation, the zygote undergoes a series of cell divisions and developmental processes to eventually form an embryo. This marks the transition from a single cell to a multicellular organism. 5. **Conclusion**: Therefore, in all sexually reproducing organisms, life begins as a single-celled zygote formed from the fusion of male and female gametes. ### Final Answer: Life begins in all sexually reproducing organisms as a **single-celled zygote**. ---
### Step-by-Step Solution: 1. **Understanding Sexual Reproduction**: Sexual reproduction involves the fusion of male and female gametes. The male gamete (sperm) and the female gamete (egg) come together during a process called fertilization. 2. **Fertilization Process**: During fertilization, the sperm and egg unite to form a zygote. This is a crucial step in sexual reproduction as it marks the beginning of a new organism's life. 3. **Formation of Zygote**: The zygote is the initial cell formed when the male and female gametes fuse. At this stage, the zygote is a single-celled structure. ...
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Which one of the following is the first cell of the new generation in all sexually reproducing organisms?

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Knowledge Check

  • Assertion : Isogametes are formed in majority of sexually reproducing organisms. Reason : Morphologically distinct type of gametes are called isogametes.

    A
    If both assertion and reason are true and reason is the correct explanation of assertion.
    B
    If both assertion and reason are true but reason is not the correct explanation of assertion.
    C
    If assertion is true but reason is false.
    D
    If both assertion and reason are false.

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