The population of an insect species shows an explosive increase in numbers during rainy

season followed by its disappearence 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: Exponential Growth Model |
NEET - 2007
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

Geometric representation of age structure is a characteristic of:

1. Biotic community

2. Population

3. Landscape

4. Ecosystem

Subtopic:  Population Characters: Age Structure & Migration |
 79%
From NCERT
NEET - 2007
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

A high density of elephant population in an area can result in:

1. Mutualism

2. Intraspecific competition

3. Interspecific competition

4. Predation on one another

Subtopic:  Population Interactions: Competition |
 70%
NEET - 2007
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

advertisementadvertisement

Praying mantis is a good example of:

1. mullerian mimicry

2. warning colouration

3. social insects

4. camouflage

Subtopic:  Population Interactions: Predation |
 56%
NEET - 2006
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

The formula for exponential population growth is :-

1. dt/dN = rN

2. dN/rN = dt

3. rN/dN = dt

4. dN/dt = rN

Subtopic:  Population: Exponential Growth Model |
 88%
From NCERT
NEET - 2006
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Annual migration does not occur in the case of:

1. Salmon

2. Siberian crane

3. Salamander

4. Arctic tern

Subtopic:  Population Characters: Age Structure & Migration |
 58%
NEET - 2006
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

advertisementadvertisement

The population dynamics of a species is basically regulated by

1. Climate

2. Food supply

3. Competition between and within the species

4. All of the above

Subtopic:  Population Dynamic |
 93%
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

In a lake that undergoes thermal stratification, blooms of phytoplankton tend to occur

1. before thermal stratification 

2. after thermal stratification 

3. at the onset of thermal stratification 

4. at the mid-phase of thermal stratification 

Subtopic:  Response of Organisms to Abiotic Factors (OLD NCERT) |
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

Commensalism is an association of two species in which

1. one lives, attached to the other, without harming it

2. both organisms derive benefits from each other

3. one derives its nutrition from the other

4. none of the above

Subtopic:  Population Interactions: Commensalism, Protocooperation & Mutualism |
 84%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

advertisementadvertisement

Some students, during a study, caught, marked and released 80 fishes in a pond. Later

100 fishes were caught at random. Among these 40 were found to be marked. What is

the approximate number of fishes in the pond?

1. 50                   

2. 100

3. 200                 

4.  4000

 61%
AIIMS - 2001
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints