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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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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Match List-I with List-II

List-I List-II
(a) Allen's Rule (i) Kangaroo rat
(b) Physiological adaptation (ii) Desert lizard
(c) Behavioural adaptation (iii) Marine fish at depth
(d) Biochemical adaptation (iv) Polar seal

Choose the correct answer from the options given below :

(a) (b) (c) (d)
1. (iv) (i) (ii) (iii)
2.  (iv) (iii) (ii) (i)
3. (iv) (ii) (iii) (i)
4. (iv) (i) (iii) (ii)
Subtopic:  Adaptations (OLD NCERT) |
 67%
From NCERT
NEET - 2021
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Given below are two statements: one is labeled as Assertion (A) and the other is labeled as Reason (R).
 Assertion (A): A person goes to a high altitude and experiences 'altitude sickness' with symptoms like breathing difficulty and heart palpitations.
Reason (R):  Due to low atmospheric pressure at high altitudes,
the body does not get sufficient oxygen. 
In light of the above statements, choose the correct answer from the options given below:
1. (A) is true but (R) is false.
2. (A) is false but (R) is true.
3. Both (A) and (R) are true and (R) is the correct explanation of (A).
4. Both (A) and (R) are true but (R) is not the correct explanation of (A).

Subtopic:  Adaptations (OLD NCERT) |
 88%
From NCERT
NEET - 2021
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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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Match the items in Column-I with those in Column-II:

Column I Column II
a. Herbivores-Plants  (i) Commensalism
b. Mycorrhiza-Plants (ii) Mutualism
c. Sheep-Cattle  (iii) Predation
d. Orchid-Tree (iv) Competition


Select the correct option from the following:

Options: (a) (b) (c) (d)
1. (iv) (ii) (i) (iii)
2. (iii) (ii) (iv) (i)
3. (ii) (i) (iii) (iv)
4. (i) (iii) (iv) (ii)

Subtopic:  Population Interactions: Competition | Population Interactions: Predation | Population Interactions: Commensalism, Protocooperation & Mutualism |
 83%
From NCERT
NEET - 2020
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An epiphyte is a plant that:
I: grows on other plants for physical support
II: affects the host negatively
 
1. Only I is correct 2. Only II is correct
3. Both I and II are correct 4. Both I and II are incorrect
Subtopic:  Population Interactions: Commensalism, Protocooperation & Mutualism |
 75%
From NCERT
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Cuscuta [dodder]:
1. is capable of living in oligotrophic soils by getting nitrogen from insectivory
2. produces haustoria that insert themselves into the vascular system of the host
3. is a typical ephemeral that complete their life cycle over many years
4. is a succulent carrying out CAM photosynthesis
Subtopic:  Population Interactions: Parasitism |
 68%
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Calotropis are avoided by grazing herbivores because they produce:
1. stipules
2. thorns
3. mustard oils
4. cardiac glycosides
Subtopic:  Population Interactions: Predation |
 87%
From NCERT
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