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

Question

Study the four statements (A-D) given below and select the two correct ones out of them: 
A. Definition of biological species was given by Ernst Mayr.
 B. Photoperiod does not affect reproduction in plants 
 C. Binomial nomenclature system was given by R.H. Whittaker. 
 D. In unicellular organisms, reproduction is synonymous with growth. 
The two correct statements are

K SURESH KUMAR · Accepted Answer

## CORE INFORMATION
✓ **Answer**: D (A and D)
## CONCEPT FRAMEWORK
	**Primary Concept**: Biological Classification, Reproduction, and Growth
	**Related Topics**: Species Concepts, Plant Physiology, Taxonomy, Microbial Growth
	**Prerequisites**: Basic understanding of biology.
## SOLUTION PATHWAY
**Given Information**:
	Four statements about biological concepts.
**Method & Steps**:
	1. **Analyze each statement individually:**
		Reasoning: Determine the validity of each statement based on biological principles.
	2. **Identify correct statements:**
		Working: Evaluate the truthfulness of each statement.
	3. **Select the correct combination:**
		Result: Choose the option containing the two correct statements.
## OPTION ANALYSIS
[A] ✓: Ernst Mayr is widely credited with the biological species concept, which defines a species as a group of interbreeding natural populations that are reproductively isolated from other such groups.
[B] :x: Photoperiod significantly affects reproduction in plants.  Many plants flower only under specific light/dark cycles.  This phenomenon is called photoperiodism.
[C] :x: The binomial nomenclature system was given by Carl Linnaeus, not R.H. Whittaker. Whittaker is known for his five-kingdom classification.
[D] ✓: In unicellular organisms like bacteria and amoeba, reproduction is primarily through cell division (binary fission, mitosis).  This process directly leads to an increase in the number of individuals, which is synonymous with growth at the population level.
## LEARNING AIDS
	**Common Mistakes**:
		1. Confusing binomial nomenclature with other classification systems: Remember Linnaeus for binomial nomenclature and Whittaker for the five-kingdom classification.
		2. Ignoring the effect of environmental factors on reproduction: Photoperiod plays a crucial role in the reproduction of many organisms, especially plants.
	**Quick Tips**:
		1. Associate 'Mayr' with 'biological species concept'.
		2. Remember that 'growth' in unicellular organisms is linked directly to 'reproduction'.

K SURESH KUMAR · Answer

A and B

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B and C

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C and D

K SURESH KUMAR · Answer

The correct Option is "A and D"

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