The Question is from neet-botany photosynthesis-in-higher-plants , and it was created by the author B VENKAT

Question

Plants adapted to low light intensity have

B VENKAT · Accepted Answer

## CORE INFORMATION
✓ **Answer**: A
## CONCEPT FRAMEWORK
**Primary Concept**: Adaptation of plants to low light intensity
**Related Topics**: Photosynthesis, Chlorophyll, Photosynthetic units, Plant morphology
**Prerequisites**: Basic understanding of photosynthesis and plant adaptations.
## SOLUTION PATHWAY
**Given Information**:
* Plants are adapted to low light intensity.
**Method & Steps**:
1. **Understanding the problem**: The question asks about a specific adaptation of plants to low light conditions.
Reasoning: Low light environments require plants to maximize light capture.
2. **Analyzing the options**:
    * Option A: Larger photosynthetic units mean more chlorophyll molecules per unit, allowing for more light absorption. This is a common adaptation in shade plants.
     * Option B: While shade plants can efficiently use low light, they generally have a lower overall rate of carbon dioxide fixation compared to sun plants.
    * Option C: Root system extension is related to water and nutrient uptake and not directly linked to low light adaptation.
    * Option D: Spines are more associated with water conservation in arid environments.
3. **Choosing the correct option**: Option A is the most relevant adaptation for low light conditions.
Result: Option A is correct.
Verification: Scientific literature supports the idea that shade plants have larger photosynthetic unit sizes.
 ## OPTION ANALYSIS
[A] ✓: Plants in low light have larger photosynthetic units to maximize light absorption.
[B] :x: Sun plants generally have a higher rate of carbon dioxide fixation due to higher light availability.
[C] :x: Root system is related to water and nutrient uptake, not specifically for low light.
[D] :x: Spines are for water conservation, not low light adaptation.
 ## LEARNING AIDS
**Common Mistakes**:
1. **Confusing adaptations**: Confusing adaptations for low light with adaptations for water conservation or nutrient absorption.
How to avoid: Focus on the specific environmental factor being addressed in the question.
2. **Assuming higher rate of CO2 fixation**: Incorrectly assuming that low light plants have a higher rate of CO2 fixation.
How to avoid: Understand that rate of photosynthesis is directly linked to light intensity.
**Quick Tips**:
1. **Photosynthetic unit size**: Remember that larger photosynthetic units are an adaptation for shade plants.
2. **Light capture**: When thinking about low light, focus on adaptations that maximize light capture.

B VENKAT · Answer

The correct Option is "Larger photosynthetic unit size than the sun plants"

B VENKAT · Answer

Higher rate of carbon dioxide fixation than the sun plants

B VENKAT · Answer

More extended root system

B VENKAT · Answer

Leaves modified to spines

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