Organisms and Population Chapter-Wise Test 19

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following is an example of an altruistic behavior in animals?

A lion hunting alone
A worker bee caring for the queen’s offspring
A snake shedding its skin
A deer migrating to a new area
2

Altruistic behavior benefits others at the expense of the individual, such as worker bees sacrificing their ability to reproduce to help the queen.

Which of the following factors directly affects birth rate in a population?

Availability of resources
Genetic drift
Climate change
Predation rate
1

Birth rates are influenced by resource availability, as sufficient food and shelter support higher reproduction.

What is the primary reason why predator populations do not exceed prey populations?

Prey reproduce faster than predators
Predators have shorter lifespans
Predators depend on prey for food
Predators do not compete for food
3

Predators depend on prey for food, so their population size is limited by the availability of prey.

Which of the following is an adaptation used by predators to catch their prey?

Warning coloration
Sharp claws and teeth
Hibernation
Symbiosis
2

Predators use adaptations like sharp claws and teeth to catch and consume prey efficiently.

Which type of ecological succession occurs in an area where no previous life existed?

Primary succession
Secondary succession
Climax community
Competitive exclusion
1

Primary succession occurs in areas where life has never existed before, such as newly formed volcanic islands.

Which factor most influences the reproductive rate of a population?

Age structure
Predation pressure
Soil composition
Weather patterns
1

Age structure determines the proportion of individuals capable of reproduction, influencing population growth rate.

Which type of species interaction occurs when both species are harmed due to competition for resources?

Commensalism
Mutualism
Competition
Predation
3

Competition occurs when two species compete for limited resources, negatively affecting both species.

Which of the following is an example of a brood parasite?

Tiger hunting a deer
Cuckoo laying eggs in a crow’s nest
Orchid growing on a tree
Clownfish living among sea anemones
2

Brood parasitism occurs when one species lays its eggs in another species’ nest, such as cuckoos laying eggs in crow nests.

Which of the following is an example of mutualism?

Cattle egret feeding on insects disturbed by grazing cattle
Lichen, a combination of fungus and algae
A lion hunting a deer
A parasitic worm living in a human intestine
2

Mutualism benefits both species, such as in lichen where fungi provide structure and algae perform photosynthesis.

Which factor distinguishes exponential growth from logistic growth?

Exponential growth includes a carrying capacity
Logistic growth has a limit, while exponential growth does not
Exponential growth occurs in all populations
Logistic growth does not occur in natural populations
2

Logistic growth includes a carrying capacity, limiting population growth, while exponential growth continues unchecked under ideal conditions.

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