Organisms and Populations Practice Questions
NEET · Biology · 936 free MCQs with instant results and detailed explanations.
936
Total
200
Easy
430
Medium
306
Hard
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Topics in Organisms and Populations
Population Growth
226
Population Interactions
244
Population Attributes
222
Organisms and Environment
244
Sample Questions from Organisms and Populations
Here are 10 sample questions. Start a quiz to get randomized questions with scoring.
Q1
Easy
What term describes the role and position a species has in its environment?
A.
Niche
B.
Habitat
C.
Ecosystem
D.
Community
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Correct Answer: A
A niche refers to how an organism fits into an ecosystem, including its role, resource use, and interactions with other species.
Q2
Easy
Which of the following is a biotic factor affecting the population of organisms in an environment?
A.
Temperature
B.
Water availability
C.
Predation
D.
Soil type
Show Answer & Explanation
Correct Answer: C
Predation is a biotic factor because it involves living organisms. The other options are abiotic factors that do not involve other living things.
Q3
Easy
In an ecosystem, the term 'carrying capacity' refers to what?
A.
The maximum number of individuals an environment can support
B.
The total biomass of all organisms
C.
The diversity of species present
D.
The energy flow within the ecosystem
Show Answer & Explanation
Correct Answer: A
Carrying capacity is the maximum number of individuals of a species that an environment can sustainably support without degrading.
Q4
Medium
Which of the following best describes an organism's niche?
A.
The role and position a species has in its environment
B.
The physical location of an organism
C.
The genetic makeup of an organism
D.
The population size of an organism
Show Answer & Explanation
Correct Answer: A
A niche refers to the role or function of an organism within its ecosystem, including its habitat, resource use, and interactions with other organisms.
Q5
Medium
In an ecosystem, what is the primary source of energy?
A.
Decomposers
B.
Herbivores
C.
Producers
D.
Carnivores
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Correct Answer: C
Producers, such as plants, convert sunlight into energy through photosynthesis, making them the primary source of energy in ecosystems.
Q6
Medium
Which of the following biomes is characterized by low precipitation and high temperatures?
A.
Tundra
B.
Desert
C.
Temperate Forest
D.
Grassland
Show Answer & Explanation
Correct Answer: B
Deserts are defined by their low precipitation and high temperatures, making them unique among biomes.
Q7
Medium
Which factor is NOT considered a biotic component of an ecosystem?
A.
Plants
B.
Animals
C.
Soil
D.
Microorganisms
Show Answer & Explanation
Correct Answer: C
Soil is an abiotic component of an ecosystem, while plants, animals, and microorganisms are biotic components.
Q8
Hard
Which of the following biomes is characterized by low temperatures, low precipitation, and permafrost?
A.
Tundra
B.
Desert
C.
Temperate Forest
D.
Savanna
Show Answer & Explanation
Correct Answer: A
The tundra biome is defined by its extremely cold temperatures, minimal precipitation, and a layer of permanently frozen soil called permafrost, making option A the correct answer.
Q9
Hard
Which of the following factors is LEAST likely to affect the distribution of a plant species in a terrestrial ecosystem?
A.
Soil pH
B.
Temperature
C.
Topography
D.
Sound Waves
Show Answer & Explanation
Correct Answer: D
While soil pH, temperature, and topography directly influence the habitat and growth conditions of plant species, sound waves do not significantly affect the distribution of plant species in a terrestrial ecosystem, making option D the correct answer.
Q10
Hard
Which of the following factors is considered an abiotic component of an ecosystem?
A.
Bacteria
B.
Mushrooms
C.
Temperature
D.
Plants
Show Answer & Explanation
Correct Answer: C
Temperature is an abiotic factor, affecting living organisms and their interactions, while others are biotic.
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Organisms and Populations — NEET Biology Practice Questions Online
This page contains 936 practice MCQs for the chapter Organisms and Populations in NEET Biology. The questions are organized by difficulty — 200 easy, 430 medium, 306 hard — so you can choose the right level for your preparation.
Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit. This chapter covers 4 topics, giving you comprehensive coverage of the entire chapter.