Organisms and Population
Test 7

Correct answer Carries: 4.

Wrong Answer Carries: -1.

What type of relationship is observed between the fig tree and the wasp?

Parasitism
Commensalism
Mutualism
Predation
3

The fig tree provides a site for wasp egg-laying, while the wasp pollinates the fig tree, making it a mutualistic relationship.

Which of the following factors causes population decline?

High natality
Immigration
Emigration
Both 2 and 3
3

Emigration leads to a decrease in population size as individuals leave a habitat.

Which of the following correctly describes the relationship between orchid and mango tree?

Commensalism
Mutualism
Parasitism
Amensalism
1

Orchid benefits by growing on the mango tree without harming or benefiting it, which is an example of commensalism.

Which of the following is a correct statement about ecological footprints?

It measures the total energy stored by producers.
It quantifies the amount of land and resources required to support an individual or population.
It only accounts for carbon emissions.
It remains constant regardless of resource consumption.
2

The ecological footprint measures the resources required to sustain an individual or population, including land use, energy, and waste production.

Which of the following statements about energy flow in an ecosystem is incorrect?

Energy flow is unidirectional in an ecosystem.
Producers convert solar energy into chemical energy.
Only 10% of energy is transferred from one trophic level to the next.
Energy is recycled within an ecosystem.
4

Energy is not recycled; it flows in one direction through the ecosystem and is eventually lost as heat.

Which of the following is an incorrect statement about biodiversity?

Biodiversity includes genetic, species, and ecosystem diversity.
Higher biodiversity generally increases ecosystem stability.
Biodiversity loss has no impact on ecosystem functions.
Conservation efforts aim to preserve biodiversity.
3

Biodiversity loss negatively impacts ecosystem functions, reducing resilience and stability.

Which of the following statements about niche differentiation is correct?

It prevents competition by allowing species to use different resources.
It increases direct competition between species.
It causes two species to occupy the exact same niche.
It reduces species diversity within an ecosystem.
1

Niche differentiation allows species to coexist by utilizing different resources, reducing direct competition.

Which of the following is a characteristic of K-selected species?

High reproductive rate
Short lifespan
Parental care and low number of offspring
Rapid population growth
3

K-selected species invest in fewer offspring with high parental care, ensuring their survival.

Which of the following best defines a population?

A group of organisms of different species living in an area
A community of interacting organisms in an ecosystem
A group of individuals of the same species living in a specific area
All organisms living in a habitat
3

A population consists of individuals of the same species inhabiting a particular area, sharing resources, and interbreeding.

What does a declining age pyramid indicate?

High natality and low mortality
More pre-reproductive individuals
More post-reproductive individuals
A stable population
3

A declining age pyramid has more post-reproductive individuals, indicating a shrinking population due to low birth rates.

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