Amensalism can be represented as:

1. Species A (-) : Species B (-)

2. Species A (+) : Species B (0)

3. Species A (-) : Species B (0)

4. Species A (+) : Species B (+)

Subtopic:  Population Interactions: Amensalism |
 85%
From NCERT
NEET - 2021
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In the exponential growth equation Nt =N0ert, e represents :

1. The base of natural logarithms 

2. The base of geometric logarithms

3. The base of number logarithms

4. The base of exponential logarithms

Subtopic:  Population: Exponential Growth Model |
 64%
From NCERT
NEET - 2021
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Inspite of interspecific competition in nature, which mechanism the competing species might have evolved for their survival?

1. Mutualism 2. Predation
3. Resource partitioning 4. Competitive release
Subtopic:  Population Interactions: Competition |
 74%
From NCERT
NEET - 2021
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Mycorrhiza is an example of:

1. Symbiotic relationship

2. Ectoparasitism

3. Endoparasitism

4. Decomposers

Subtopic:  Population Interactions: Coevolution |
 96%
From NCERT
AIPMT - 2003
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Which of the following is a correct pair: 

1. Cuscuta – parasite

2. Dischidia – insectivorous

3. Opuntia – predator

4. Capsella – hydrophyte

Subtopic:  Population Interactions: Parasitism |
 88%
From NCERT
AIPMT - 2002
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Two different species cannot live for a long duration in the same niche or habitat. This is:

1. Allen's law

2. Gloger's rule

3. Competitive exclusion principle

4. Weismann's theory

Subtopic:  Population Interactions: Competition |
 90%
From NCERT
AIPMT - 2002
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A male insect mistakes an orchid flower to be female due to its shape and performs the act of copulation and induces pollination. This is an example of:
1.  Mimicry
2.  Pseudocopulation
3.  Pseudopollination
4.  None

Subtopic:  Population Interactions: Coevolution |
 84%
From NCERT
AIPMT - 1998
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The logistic population growth is expressed by the equation:

1. dNdt=rNN-KN

2. dtdN=NrK-NK

3. dNdt=rNK-NK

4. dNdt=rN

Subtopic:  Population: Logistic Growth Model |
 82%
From NCERT
AIPMT - 2011
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Which one of the following is most appropriately defined:

1. Amensalism is a relationship in which one species is benefited whereas the other is unaffected
2. Predator is an organism that catches and kills other organism for food.
3. Parasite is an organism which always lives inside the body of another organism and may kill it.
4. Host is an organism which provides food to another organism.
Subtopic:  Population Interactions: Predation |
 68%
From NCERT
AIPMT - 2010
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The impact of immigration on population density is:

1. Negative
2. Both positive and negative
3. Neutralized by natality
4. Positive

Subtopic:  Population Characters: Density | Population Characters: Natality & Mortality |
 83%
From NCERT
NEET - 2020
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