The Question is from neet-botany sexual-reproduction-in-flowering-plants , and it was created by the author B VENKAT

Question

A mutation affects the tapetum in a developing anther, leading to premature degeneration of this tissue. What is the MOST likely direct consequence of this mutation?

B VENKAT · Accepted Answer

## CORE INFORMATION
✓ **Answer**: C
## CONCEPT FRAMEWORK
 **Primary Concept**: Plant reproductive biology, specifically anther development and pollen formation.
 **Related Topics**: Tapetum function, pollen wall formation, microspore development.
 **Prerequisites**: Understanding of the role of the tapetum in pollen development.
## SOLUTION PATHWAY
**Given Information**:
A mutation causes premature degeneration of the tapetum in a developing anther.
**Method & Steps**:
1. Identify the function of the tapetum.
  Reasoning: The tapetum is a specialized nutritive layer within the anther that plays a crucial role in pollen development.  It provides nutrients and precursors for pollen wall formation.
  Formula/Rule: None directly applicable.
2. Consider the consequences of premature tapetum degeneration.
  Working: If the tapetum degenerates prematurely, it will not be able to provide the necessary nutrients and components for proper pollen wall development. This will directly impact pollen viability.
  Key Point: The tapetum is essential for pollen wall formation and maturation.
3. Determine the most likely direct consequence.
  Result: Defective pollen wall formation and reduced pollen viability.
  Verification: The other options are less likely because they represent positive outcomes, which are inconsistent with the negative effect of tapetum degeneration.
 ## OPTION ANALYSIS
A :x: Increased production of viable pollen grains.  This is the opposite of what would be expected with tapetum damage.
B :x: Enhanced pollen germination rates.  This is also unlikely given the impaired pollen development.
C ✓: Defective pollen wall formation and reduced pollen viability. This is the direct and most likely consequence of premature tapetum degeneration because the tapetum is essential for pollen wall formation and nutrient supply.
D :x: Accelerated development of the microspore mother cells.  The tapetum's role is primarily in supporting pollen development after microspore formation, not directly affecting the rate of microspore mother cell development.
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing the tapetum's role with other anther tissues:  Understanding the specific function of the tapetum is crucial.
  2.Focusing on indirect consequences: The question asks for the MOST likely *direct* consequence.
 **Quick Tips**:
  1.Remember that the tapetum nourishes and provides materials for pollen wall development.
  2.Visualize the anther structure and the tapetum's location within it.

B VENKAT · Answer

Increased production of viable pollen grains.

B VENKAT · Answer

Enhanced pollen germination rates.

B VENKAT · Answer

The correct Option is "Defective pollen wall formation and reduced pollen viability."

B VENKAT · Answer

Accelerated development of the microspore mother cells.

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