Ecology - Organisms & Populations

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Q1. What is the term for the gradual change in species composition in a given area over time? (2023)

Solution:

Succession refers to the process of change in the species structure of an ecological community over time.

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Q2. In which type of population distribution do individuals have a uniform distance between them? (2019)

Solution:

Uniform distribution occurs when individuals are evenly spaced, often due to competition for resources.

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Q3. In which type of population growth does the growth rate decrease as the population reaches its carrying capacity? (2019)

Solution:

Logistic growth describes a population that grows rapidly at first and then slows as it approaches the carrying capacity.

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Q4. Which of the following best describes a population? (2020)

Solution:

A population is defined as all individuals of a particular species that live in a specific area.

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Q5. Which of the following is a biotic factor in an ecosystem? (2020)

Solution:

Biotic factors are the living components of an ecosystem, which include plants, animals, and microorganisms.

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Q6. What is the primary characteristic of a K-selected species? (2023)

Solution:

K-selected species typically exhibit high parental care and invest more resources in fewer offspring.

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Q7. In ecological succession, what is the term for the first species to colonize a barren environment? (2022)

Solution:

Pioneer species are the first organisms to colonize previously uninhabited or disturbed environments.

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Q8. Which of the following is NOT a characteristic of a population? (2023)

Solution:

Species diversity refers to the variety of species in an ecosystem, not a characteristic of a single population.

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Q9. Which of the following is NOT a characteristic of r-selected species? (2019)

Solution:

R-selected species are characterized by high fecundity and short lifespans, not long gestation periods.

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Q10. Which of the following factors is considered an abiotic factor? (2019)

Solution:

Abiotic factors are non-living chemical and physical components of the environment, such as sunlight, temperature, and water.