Populations
Which describes members of the same species living in one area?
A) Community
B) Population
C) Biome
D) Habitat
B) Population
Which is a density-independent factor?
A) Food supply
B) Infectious virus
C) Parasites
D) Cold winter
D) Cold winter
Which is an example of genetic diversity?
A) Types of plants in a rainforest
B) Jaguar spot variations
C) Number of beetle species
D) DNA of a sloth
B) Jaguar spot variations
Which activity contributes most to acid rain?
A) Using pesticides
B) Passing environmental laws
C) Burning fossil fuels
D) Reforestation
C) Burning fossil fuels
Long-term shifts in worldwide weather patterns:
A) Global warming
B) Global climate change
C) Greenhouse effect
D) Albedo
B) Global climate change
What type of dispersion do jaguar pairs show?
A) Clumped
B) Random
C) Uniform
D) Nonuniform
C) Uniform
Which term means the maximum number an environment can support?
A) Limiting factor
B) Carrying capacity
C) Population density
D) Age structure
B) Carrying capacity
Which type of diversity measures number and abundance of species?
A) Genetic diversity
B) Species diversity
C) Ecosystem diversity
D) Biodiversity
B) Species diversity
The removal of all trees in an area is called:
A) Habitat fragmentation
B) Deforestation
C) Edge effect
D) Pollution
B) Deforestation
Earth’s path around the sun is called:
A) Rotation
B) Orbit
C) Albedo
D) Feedback
B) Orbit
On 10 acres of forest: 8 deer, 7 coyotes, 45 armadillos, 231 pine trees. Which has the highest density?
A) Deer
B) Coyotes
C) Armadillos
D) Pine trees
D) Pine trees
Which of the following is not a factor that limits population range?
A) Rainfall and sunlight
B) Predators
C) Distribution of food
D) Carrying capacity
D) Carrying capacity
Which of the following is a direct benefit of biodiversity?
A) Faster erosion rates
B) Improved soil fertility
C) Decreased CO₂
D) More rainfall
B) Improved soil fertility
An introduced species that disrupts ecosystems is called:
A) Invasive species
B) Vulnerable species
C) Endangered species
D) Native species
A) Invasive species
The percentage of sunlight reflected by Earth’s surface:
A) Wobble
B) Orbit
C) Albedo
D) Feedback
C) Albedo
Which factor can change the range of a population?
A) Only biotic factors
B) Only abiotic factors
C) Both biotic and abiotic factors
D) Carrying capacity
C) Both biotic and abiotic factors
Which is used to describe population characteristics?
A) Age structure, biomes, limiting factors
B) Density, distribution, growth rate
C) Migration, parasitism, symbiosis
D) Range, climate, latitude
B) Density, distribution, growth rate
Which species has the highest risk of extinction?
A) Invasive
B) Endangered
C) Vulnerable
D) Common
B) Endangered
A country’s ecological footprint is measured by:
A) Barrels of oil per person
B) Metals used by industry
C) Food consumed per country
D) Land area used per person
D) Land area used per person
Which defines extinction?
A) An ecosystem disappears
B) A species disappears
C) Genetic diversity drops
D) Biodiversity increases
B) A species disappears
When a population reaches carrying capacity, what happens to the death rate?
A) Decreases
B) Increases
C) Stays the same
D) Becomes random
B) Increases
Which term describes the complete study of human populations?
A) Geography
B) Ecology
C) Demography
D) Anthropology
C) Demography
The variety of areas where organisms live in the biosphere is called:
A) Ecosystem diversity
B) Biodiversity
C) Genetic diversity
D) Species diversity
A) Ecosystem diversity
The separation of an ecosystem into smaller pieces is:
A) Edge effect
B) Habitat fragmentation
C) Biodiversity loss
D) Deforestation
B) Habitat fragmentation
Which statement about background extinction is true?
A) All extinctions are mass extinctions
B) They are a normal part of stable ecosystems
C) They only occur due to humans
D) They never occur naturally
B) They are a normal part of stable ecosystems