The Question is from neet-botany biodiversity what-is-living, and it was created by the author K SURESH KUMAR

Question

Growth in unicellular organisms can be observed by

K SURESH KUMAR · Accepted Answer

## CORE INFORMATION
✓ **Answer**: [D]
## CONCEPT FRAMEWORK
	**Primary Concept**: Growth measurement in unicellular organisms
	**Related Topics**: Cell culture, microscopy, cellular biology
	**Prerequisites**: Understanding of cell division and growth measurement techniques
## SOLUTION PATHWAY
**Given Information**:
		1. Unicellular organisms are capable of growth and reproduction.
		2. Various methods can be used to measure their growth.
**Method & Steps**:
	1. Identify common methods of measuring growth in unicellular organisms.
		Reasoning: Different methods provide different insights into growth.
		Formula/Rule: N/A
	2. Analyze the options provided.
		Working: 
		- Counting the mass of cultured cells may not accurately reflect growth rate or cell division. 
		- Analyzing nutrient absorption is indirect and may not represent overall growth.
		- The statement that growth cannot be observed is incorrect.
	3. Evaluate the most direct and effective method.
		Result: Directly counting cells under a microscope provides a clear measure of growth by observing cell division.
		Verification: Observing an increase in cell count indicates growth.
## OPTION ANALYSIS
[A] :x: Counting the mass of cultured cells does not provide a direct measure of growth in unicellular organisms as mass can vary independently of cell number.
[B] :x: Analyzing the amount of nutrient absorbed can indicate metabolic activity but does not directly measure growth.
[C] :x: The assertion that growth cannot be observed is fundamentally incorrect; growth is observable through various methods.
[D] ✓: In vitro culture by simply counting the number of cells under a microscope is a direct and effective method to observe growth in unicellular organisms. 
## LEARNING AIDS
	**Common Mistakes**:
		1. Confusing mass measurement with cell count: Always distinguish between biomass and cell number when assessing growth.
		2. Misunderstanding growth indicators: Recognize that growth can be quantified in several ways, not just by mass.
	**Quick Tips**:
		1. Remember that direct observation methods (like microscopy) provide clearer data on cell growth and division.
		2. Familiarize yourself with different growth measurement techniques for a more comprehensive understanding.

K SURESH KUMAR · Answer

Counting the mass of cultured cells

K SURESH KUMAR · Answer

Analysing the amount of nutrient absorb by living organism

K SURESH KUMAR · Answer

Growth can not be observed

K SURESH KUMAR · Answer

The correct Option is "In vitro culture by simply counting the number of cells under microscope"

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