In a growing population of a country:
1. pre-reproductive individuals are more than reproductive individuals.
2. reproductive individuals are less than post-reproductive individuals.
3. reproductive and pre-reproductive individuals are equal in number.
4. pre-reproductive individuals are less than reproductive individuals.

Subtopic:  Population Attributes |
 85%
From NCERT
NEET - 2018
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Which one of the following population interactions is widely used in medical science for the production of antibiotics ?

1. Commensalism
2. Mutualism
3. Parasitism
4. Amensalism

Subtopic:  Population Interactions: Amensalism |
 61%
NEET - 2018
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It is much easier for a small animal to run Uphill than for a large animal, because?
 
1. Smaller animals have a higher metabolic rate
2. Small animals have a lower O2 requirement
3. The efficiency of muscles in large animals is less than, in the small animals
4. It is easier to carry a small body weight

Subtopic:  Response of Organisms to Abiotic Factors (OLD NCERT) | Adaptations (OLD NCERT) |
 51%
NEET - 2016
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According to Darwin, organic evolution is due to:

1.  Interspecific competition.
2.  Competition within closely related species.
3.  Reduced feeding efficiency in one species due to the presence of interfering species.
4.  Intraspecific competition.

Subtopic:  Population Interactions: Competition |
 67%
From NCERT
AIPMT - 2013
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What type of human population is represented by the following age pyramid? 

  
1.  Stable population
2.  Declining population
3.  Expanding population
4.  Vanishing population
Subtopic:  Population Characters: Age Structure & Migration |
 84%
From NCERT
AIPMT - 2011
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Which one of the following is categorized as a parasite in a true sense?
1. Human foetus developing inside the uterus draws nourishment from the mother
2. Head louse living on the human scalp as well as laying eggs on human hair
3. The cuckoo (koel) lays its eggs in a crow's nest
4. The female Anopheles bites and sucks blood from humans
Subtopic:  Population Interactions: Parasitism |
 69%
From NCERT
AIPMT - 2011
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Formation of tropical forests needs mean annual temperature and mean annual precipitation as:

1. 18 – 25oC and 150 - 400cm

2. 5 – 15oC and 50 – 100 cm

3. 30 – 50oC and 100 – 150cm

4. 5 – 15oC and 100 – 200 cm

Subtopic:  Introduction to the Chapter |
 76%
From NCERT
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The table below gives the populations(in thousands) of ten species(A--J) in four areas (a-d) consisting of the number of habitats given within brackets against each. Study the table and answer the question as follows: 
which area out of a to d shows maximum species diversity? 

1. b

2. c

3. a

4. d

Subtopic:  Population Dynamic |
AIPMT - 2008
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The population of an insect species shows an explosive increase in numbers during the rainy season followed by its disappearance at the end of the season. What does this show?

1. S-shaped or sigmoid growth of this insect
2. the food plants mature and die at the end
of the rainy season
3. Its population growth curve is of J-type
4. The population of its predators increases
enormously

Subtopic:  Population: Logistic Growth Model |
 57%
AIPMT - 2007
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If the mean and the median pertaining to a certain character of a population are of the same value, the following is most likely to occur:

1. a normal distribution

2. a bi-modal distribution

3. a T-shaped curve

4. a skewed curve

Subtopic:  Population Dynamic |
AIPMT - 2007
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