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Zygote in sexually reproducing organisms...

Zygote in sexually reproducing organisms

A

is a vital link ensuring continuity of species from one generation to the other

B

it undergoes mitosis in organisms with haplontic life cycle to form embryo

C

it is the first cell of gametophytic phase

D

it is the last cell of sporophytic phase

Text Solution

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The correct Answer is:
### Step-by-Step Solution: 1. **Understanding the Zygote**: - A zygote is the initial cell formed when two gametes (sperm and egg) fuse during fertilization in sexually reproducing organisms. It represents the first stage of development for a new organism. 2. **Role of the Zygote**: - The zygote is crucial for the continuity of a species. It carries genetic material from both parents, which ensures that the offspring have a mix of traits from both the mother and father. 3. **Chromosome Number**: - In sexually reproducing organisms, gametes are haploid (n), meaning they contain one set of chromosomes. When the male and female gametes fuse, they form a diploid zygote (2n), which contains two sets of chromosomes. 4. **Continuity of Species**: - The formation of the zygote is essential for the continuation of a species. Since the zygote has the diploid number of chromosomes, it ensures that the genetic information is preserved and passed on to the next generation. 5. **Conclusion**: - Therefore, the correct answer to the question about the role of the zygote in sexually reproducing organisms is that it is a vital link ensuring continuity of a species from one generation to another. ### Answer: **Option A: It is a vital link ensuring continuity of species from one generation to another.** ---
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