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1. Fern prothallus-
- A. Haploid
- B. Haploid
- C. Haploid
- D. Haploid
Answer: Option A
Explanation:
A fern prothallus is haploid.
Explanation:
Explanation:
- Haploid: A haploid cell has only one set of chromosomes. In the life cycle of a fern, the prothallus is the gametophyte stage, which is haploid. It develops from a haploid spore and produces gametes (sperm and eggs) through mitosis.
- Diploid: A diploid cell has two sets of chromosomes. The sporophyte generation of a fern is diploid. It produces spores through meiosis, which results in haploid spores. These spores then germinate to form the haploid prothallus.
- Triploid: Triploid cells have three sets of chromosomes. This is not the usual ploidy level for a fern prothallus.
- Polyploid: Polyploid cells have more than two sets of chromosomes. While polyploidy can occur in some ferns, the prothallus is typically haploid, not polyploid.
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