The Question is from neet-botany plant-kingdom bryophyta, and it was created by the author Mr. NARESH KUMAR K

Question

The sporophyte of a certain bryophyte is completely dependent on the gametophyte.  Microscopic examination of its cells reveals the presence of prominent plasmodesmata.  Which of the following is LEAST likely to be true about this bryophyte?

Mr. NARESH KUMAR K · Accepted Answer

## CORE INFORMATION
✓ **Answer**: A
## CONCEPT FRAMEWORK
 **Primary Concept**: Bryophyte characteristics and classification
 **Related Topics**: Sporophyte dependence, plasmodesmata, Anthocerotopsida, homospory, asexual reproduction
 **Prerequisites**: Basic understanding of bryophyte life cycle and morphology.
## SOLUTION PATHWAY
**Given Information**:
    * The bryophyte sporophyte is completely dependent on the gametophyte.
    * Prominent plasmodesmata are present in sporophyte cells.
**Method & Steps**:
  1. Analyze the characteristics of different bryophyte classes.
     Reasoning:  The presence of prominent plasmodesmata suggests a relatively simple sporophyte structure, consistent with some bryophyte groups.  Complete dependence on the gametophyte further points to a less developed sporophyte.
  2. Evaluate each option based on the given information and general bryophyte knowledge.
     Working:
        * **A:** Anthocerotes (Anthocerotopsida) have sporophytes that are more elongated and somewhat independent compared to other bryophytes. They often have stomata and are generally more complex than the sporophyte described in the question.
        * **B:** Many bryophytes have sporophytes lacking stomata, especially those with simpler sporophytes that are dependent on the gametophyte for nutrition and water.
        * **C:** Most bryophytes are homosporous (produce one type of spore), which is consistent with a simple life cycle.  This is likely.
        * **D:** Asexual reproduction through fragmentation of the gametophyte is common in bryophytes.
  3. Determine the least likely option.
     Result: Option A is the least likely. The description points to a simpler sporophyte than typically found in Anthocerotopsida.
     Verification: The other options are consistent with the description of a bryophyte with a simple, gametophyte-dependent sporophyte.
## OPTION ANALYSIS
A ✓: Anthocerotopsida typically have more complex and less dependent sporophytes than described.  Their sporophytes are often photosynthetic and possess stomata, unlike the dependent sporophyte in this question.
B :x:  Many bryophytes with dependent sporophytes lack stomata.
C :x: Homospory is common in bryophytes.
D :x: Fragmentation is a common mode of asexual reproduction in bryophytes.
## LEARNING AIDS
 **Common Mistakes**:
  1. Overgeneralizing bryophyte characteristics: Not all bryophytes share the same traits.  Consider the diversity within the group.
  2. Failing to consider the degree of sporophyte dependence:  The level of dependence is a crucial factor in bryophyte classification.
 **Quick Tips**:
  1. Focus on the key features:  Sporophyte dependence and plasmodesmata presence are crucial in narrowing down the possibilities.
  2. Remember the general trends:  Simpler sporophytes are typically more dependent on the gametophyte.

Mr. NARESH KUMAR K · Answer

The correct Option is "It belongs to the class Anthocerotopsida."

Mr. NARESH KUMAR K · Answer

Its sporophyte lacks stomata.

Mr. NARESH KUMAR K · Answer

It is homosporous.

Mr. NARESH KUMAR K · Answer

It reproduces asexually through fragmentation of the gametophyte.

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