,BIOD 102 Final Exam | Q&A | 2026/2027 | Essential Biology | Portage
Learning
1. All of Earth that is inhabited by life is called the:
A) Ecosystem
B) Community
C) Biosphere
D) Habitat
Correct Answer: Biosphere
Rationale: The biosphere is the highest level of biological organization and
encompasses all regions of Earth where life exists. An ecosystem includes
living and nonliving components, a community is all populations in an area,
and a habitat is the specific environment where an organism lives.
2. The level of ecological organization that incorporates abiotic factors is the:
A) Population
B) Community
C) Ecosystem
D) Biosphere
Correct Answer: Ecosystem
Rationale: An ecosystem includes both biotic (living) and abiotic (nonliving)
components in a specific area. A population is a group of one species, and a
community includes multiple populations without considering abiotic factors.
3. The major factors affecting the distribution of biomes on Earth are:
A) Altitude and longitude
,B) Temperature and rainfall
C) Soil type and wind patterns
D) Latitude and ocean currents
Correct Answer: Temperature and rainfall
Rationale: The major factors affecting the distribution of biomes are
temperature and rainfall. These determine the types of vegetation and
animal life that can survive in a particular region.
4. Which of the following biomes is characterized by permafrost, extreme
cold, and is treeless?
A) Coniferous forest
B) Temperate grassland
C) Tundra
D) Tropical rainforest
Correct Answer: Tundra
Rationale: The tundra is a treeless region characterized by extreme cold,
wind, and permafrost (permanently frozen subsoil). Coniferous forests have
cone-bearing trees, temperate grasslands have grasses, and tropical
rainforests have high rainfall.
5. Prokaryotes are classified into which two domains?
A) Protista and Fungi
B) Bacteria and Archaea
C) Eubacteria and Eukarya
D) Archaea and Protista
, Correct Answer: Bacteria and Archaea
Rationale: Prokaryotes are classified into two domains: Bacteria and Archaea.
Both are prokaryotic (lack a nucleus), but they differ in cell wall composition
and other biochemical characteristics.
6. Unlike archaea, bacterial cell walls contain a unique substance called:
A) Cellulose
B) Chitin
C) Peptidoglycan
D) Lipopolysaccharide
Correct Answer: Peptidoglycan
Rationale: Bacterial cell walls contain a unique substance called
peptidoglycan. Archaea lack peptidoglycan and have different cell wall
compositions. Cellulose is found in plant cell walls, and chitin is found in
fungal cell walls.
7. The capsule and pili function primarily to:
A) Move bacteria through their environment
B) Stick prokaryotes to a substrate or one another
C) Protect bacteria from antibiotics
D) Store genetic information
Correct Answer: Stick prokaryotes to a substrate or one another
Learning
1. All of Earth that is inhabited by life is called the:
A) Ecosystem
B) Community
C) Biosphere
D) Habitat
Correct Answer: Biosphere
Rationale: The biosphere is the highest level of biological organization and
encompasses all regions of Earth where life exists. An ecosystem includes
living and nonliving components, a community is all populations in an area,
and a habitat is the specific environment where an organism lives.
2. The level of ecological organization that incorporates abiotic factors is the:
A) Population
B) Community
C) Ecosystem
D) Biosphere
Correct Answer: Ecosystem
Rationale: An ecosystem includes both biotic (living) and abiotic (nonliving)
components in a specific area. A population is a group of one species, and a
community includes multiple populations without considering abiotic factors.
3. The major factors affecting the distribution of biomes on Earth are:
A) Altitude and longitude
,B) Temperature and rainfall
C) Soil type and wind patterns
D) Latitude and ocean currents
Correct Answer: Temperature and rainfall
Rationale: The major factors affecting the distribution of biomes are
temperature and rainfall. These determine the types of vegetation and
animal life that can survive in a particular region.
4. Which of the following biomes is characterized by permafrost, extreme
cold, and is treeless?
A) Coniferous forest
B) Temperate grassland
C) Tundra
D) Tropical rainforest
Correct Answer: Tundra
Rationale: The tundra is a treeless region characterized by extreme cold,
wind, and permafrost (permanently frozen subsoil). Coniferous forests have
cone-bearing trees, temperate grasslands have grasses, and tropical
rainforests have high rainfall.
5. Prokaryotes are classified into which two domains?
A) Protista and Fungi
B) Bacteria and Archaea
C) Eubacteria and Eukarya
D) Archaea and Protista
, Correct Answer: Bacteria and Archaea
Rationale: Prokaryotes are classified into two domains: Bacteria and Archaea.
Both are prokaryotic (lack a nucleus), but they differ in cell wall composition
and other biochemical characteristics.
6. Unlike archaea, bacterial cell walls contain a unique substance called:
A) Cellulose
B) Chitin
C) Peptidoglycan
D) Lipopolysaccharide
Correct Answer: Peptidoglycan
Rationale: Bacterial cell walls contain a unique substance called
peptidoglycan. Archaea lack peptidoglycan and have different cell wall
compositions. Cellulose is found in plant cell walls, and chitin is found in
fungal cell walls.
7. The capsule and pili function primarily to:
A) Move bacteria through their environment
B) Stick prokaryotes to a substrate or one another
C) Protect bacteria from antibiotics
D) Store genetic information
Correct Answer: Stick prokaryotes to a substrate or one another
