GRADE: /50 A
IB:5
Ecosystems I-Assessment
Multiple Choice Questions (1 mark each)
1. What is the name given to a group of organisms that can interbreed and produce
fertile offspring?
A. Ecosystem
B. Species
C. Community
D. Niche
2. Which of the following determines the trophic level of an organism?
A. The position of the organism in a food chain
B. The number of organisms present in a food chain
C. The number of different species present in a food web
D. The rate at which the organism converts solar energy into chemical energy
3. When animals eat other animals, they could be
A. primary consumers.
B. secondary consumers.
C. producers.
D. herbivores.
, 4. Which of the following is the best definition of a community?
A.A group of organisms of the same species living in the same area at the same time
and capable of interbreeding.
B. The environment in which a species normally lives.
C. A group of populations living and interacting with each other in a common habitat.
D. A group of organisms that interbreed and produce fertile offspring.
5. Which process lowers the level of CO2 in the atmosphere?
A. Volcanic eruption
B. Combustion
C. Photosynthesis
D. Respiration
6. In an area of grassland, a sudden severe frost reduces the population of butterflies.
Of what is this frost an example?
A. A density-dependent factor
B. Biological competition
C. Predation
D. A density-independent factor
7. Which is the main reservoir of nitrogen?
A. The atmosphere
B. Forests
IB:5
Ecosystems I-Assessment
Multiple Choice Questions (1 mark each)
1. What is the name given to a group of organisms that can interbreed and produce
fertile offspring?
A. Ecosystem
B. Species
C. Community
D. Niche
2. Which of the following determines the trophic level of an organism?
A. The position of the organism in a food chain
B. The number of organisms present in a food chain
C. The number of different species present in a food web
D. The rate at which the organism converts solar energy into chemical energy
3. When animals eat other animals, they could be
A. primary consumers.
B. secondary consumers.
C. producers.
D. herbivores.
, 4. Which of the following is the best definition of a community?
A.A group of organisms of the same species living in the same area at the same time
and capable of interbreeding.
B. The environment in which a species normally lives.
C. A group of populations living and interacting with each other in a common habitat.
D. A group of organisms that interbreed and produce fertile offspring.
5. Which process lowers the level of CO2 in the atmosphere?
A. Volcanic eruption
B. Combustion
C. Photosynthesis
D. Respiration
6. In an area of grassland, a sudden severe frost reduces the population of butterflies.
Of what is this frost an example?
A. A density-dependent factor
B. Biological competition
C. Predation
D. A density-independent factor
7. Which is the main reservoir of nitrogen?
A. The atmosphere
B. Forests
