Organisms and Population Chapter-Wise Test 24

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which type of population dispersion pattern is most commonly observed in nature?

Uniform dispersion
Random dispersion
Clumped dispersion
Even dispersion
3

Clumped dispersion is the most common pattern in nature, as individuals often aggregate in patches due to resource availability or social behavior.

Which species interaction is beneficial for one species while the other is unaffected?

Commensalism
Parasitism
Predation
Competition
1

Commensalism is an interaction where one species benefits while the other remains unaffected.

Which type of succession occurs after a volcanic eruption?

Primary succession
Secondary succession
Tertiary succession
Climax succession
1

Primary succession occurs in areas where there was no previous life, such as a newly formed volcanic island.

Which of the following is an incorrect statement about food webs?

Food webs show multiple interconnected food chains.
Energy flow in a food web is always unidirectional.
Primary producers form the base of the food web.
Decomposers are not part of food webs.
4

Decomposers are essential in food webs as they break down dead organisms and recycle nutrients.

Which factor is NOT considered in the logistic growth model?

Intrinsic rate of natural increase
Carrying capacity
Population density
Mutation rate
4

The logistic growth model considers carrying capacity, population density, and birth/death rates, but not mutation rate.

Which of the following is an example of natality?

Number of individuals immigrating into a population
Number of births in a population per unit time
Number of individuals leaving a population
Number of deaths in a population
2

Natality refers to the birth rate or the number of individuals born in a population per unit time.

Which of the following statements about ecological footprints is correct?

It measures the land and resources required to support an individual or population.
It only accounts for carbon emissions.
It remains constant regardless of resource consumption.
It does not include water or food consumption.
1

The ecological footprint quantifies resource use, including land, energy, water, and waste production.

What is the primary reason for population fluctuations in nature?

Availability of food and resources
Stable birth and death rates
Genetic drift
Internal organ development
1

The availability of food and resources directly affects population size and leads to natural fluctuations.

Which of the following organisms is most likely to follow a Type III survivorship curve?

Elephants
Tigers
Frogs
Humans
3

Type III survivorship curves are seen in species like frogs, which produce many offspring with high mortality at early stages.

Which of the following is an example of intraspecific competition?

Lions and hyenas competing for food
Two male deer fighting for a mate
A shark hunting a seal
Barnacles and mussels competing for space
2

Intraspecific competition occurs between members of the same species, such as two male deer competing for a mate.

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