Just as a person moving from Delhi to Shimla to escape the heat for the duration of hot summer, thousands of migratory birds from Siberia and other extremely cold northern regions move to:

1. Western Ghat

2. Meghalaya

3. Corbett National Park

4. Keoladeo National Park

Subtopic:  Response of Organisms to Abiotic Factors |
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A sedentary sea anemone gets attached to the shell lining of a hermit crab. The association is :

1. Symbiosis

2. Commensalism

3. Amensalism

4. Ectoparasitism

Subtopic:  Population Interactions: Commensalism, Protocooperation & Mutualism |
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A biologist studied the population of rats in a barn. He found that the average natality was 250, average mortality 240, immigration 20 and emigration 30. The net increase in population is :

1. 15

2. 05

3. zero

4. 10

Subtopic:  Population Characters: Density |
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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 |
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Consider the following four conditions (I-IV) and select the correct pair of them as an adaption to the environment in desert lizards. 
The conditions: 
I. Burrowing in soil to escape high temperature
II. Losing heat rapidly from the body during high temperature
III. Bask in the sun when the temperature is low 
IV. Insulating body due to the thick fatty dermis
 
1. (I) and (III) 2. (II) and (IV)
3. (I) and (II) 4. (III) and (IV)
Subtopic:  Adaptations |
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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 |
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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 |
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Study the four statements (a–d) given below and select the two correct ones out of them –
a. A lion eating a deer and a sparrow feeding on grain are ecologically similar in being consumers
b. Predator star fish Pisaster helps in maintaining species diversity of some invertebrates
c. Predators ultimately lead to the extinction of prey species
d. Production of chemicals such as nicotine, strychnine by the plants are metaboilic disorders
The two correct stament are-
1. a and d
2. a and b
3. b and c
4. c and d

Subtopic:  Population Interactions: Predation |
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The figure given below is a diagrammatic representation of the response of organisms to abiotic factors. What do (a), (b) and (c) represent, respectively? 
   

(a)

(b)

(c)

1.

Regulator

Conformer

Partial regulator

2.

Conformer

Regulator

Partial regulator

3.

Regulator

Partial regulator

Conformer

4.

Partial regulator

Regulator

Conformer

Subtopic:  Response of Organisms to Abiotic Factors |
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A country with a high rate of population growth took measures to reduce it. The figure below shows age-sex pyramids of populations. A and B are twenty years apart. Select the correct interpretation about them: 
 
Interpretations

1. 'A' is more recent and shows a slight reduction in the growth rate
2. 'B' is an earlier pyramid and shows stabilised growth rate
3. 'B' is more recent showing that the population is very young
4. 'A' is the earlier pyramid and no change has occurred in the growth rate

Subtopic:  Population Characters: Density | Population Characters: Age Structure & Migration |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology