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In the life cycle of Funaria first stage...

In the life cycle of Funaria first stage of the gametophyte

A

Bears sex organs

B

Is branched and frequently filamentous

C

Possesses spirally arranged leaves

D

Develops directly from zygote

Text Solution

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The correct Answer is:
To answer the question regarding the first stage of the gametophyte in the life cycle of Funaria (a type of moss), we can break down the information as follows: ### Step-by-Step Solution: 1. **Understanding Funaria**: Funaria is a genus of mosses, which are classified under the group known as Bryophytes. In the life cycle of mosses, the dominant phase is the gametophyte stage. 2. **Identifying the Stages of Gametophyte**: The gametophyte stage consists of two distinct phases: - The **first stage** is known as the **protonema stage**. - The **second stage** is referred to as the **leafy stage**. 3. **Describing the Protonema Stage**: - The protonema stage develops directly from a **spore**. - It is characterized as a **creeping**, **green**, **branched**, and **frequently filamentous structure**. 4. **Characteristics of Protonema**: - The protonema is the initial growth form after the spore germinates. - It is important to note that the protonema does not develop from the zygote; instead, it arises from the spore. 5. **Conclusion**: Therefore, the first stage of the gametophyte in the life cycle of Funaria is the **protonema stage**, which is a branched and filamentous structure that develops from the spore. ### Summary: - The first stage of the gametophyte in Funaria is the **protonema stage**, characterized by its creeping, green, branched, and filamentous form.
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Knowledge Check

  • Funaria is an example of a bryophyte. In the life cycle of Funaria, the gametophytic

    A
    generation is diploid and the sporophytic generation is haploid
    B
    generation is haploid and the sporophytic generation is diploid
    C
    and sporophytic generations are haploid
    D
    and sporophytic generations are diploid
  • In the life cycle of Funaria, spores are beginning of the generation

    A
    gametophyte
    B
    sporophyte
    C
    peristome
    D
    both 1 and 2
  • The gametophyte of Funaria is

    A
    Dioecious and autoicous
    B
    Monoecious and autoicous
    C
    Monoecious and heteroicous
    D
    Dioecious and heteroicous.
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