Georgia Science Grade 7

Chapter 24: Interactions of Life

Interactions of Life

1
Which of these organisms is a producer?
A)trout
B)fern
C)bear
D)snake
2
Cactus plants are usually found in which environment?
A)aquatic regions
B)arctic regions
C)tropical rain forest regions
D)desert regions
3
A salamander's habitat is which of these?
A)the arctic region
B)a hollow cactus
C)the ocean
D)a forest floor
4
__________ limits population size.
A)Symbiosis
B)Mutualism
C)Competition
D)Parasitism
5
All populations living together in an ecosystem are called a __________.
A)community
B)biosphere
C)sample count
D)predator
6
Which of these limits the size of a population?
A)an increased amount of water
B)an increase in the number of prey
C)a decrease in competition
D)a reduction in living space
7
Which of these is a method used to count the size of a population in a large area?
A)photosynthesis
B)ecology
C)sample counts
D)population density
8
Which of these factors helps a population grow?
A)limited living space
B)reduced amounts of food
C)increased numbers of predators
D)plenty of water
9
A population of wolves lives in a region with plenty of food, water, and living space. Which of these is true?
A)The wolf population lives in a poor habitat.
B)The wolf population faces increased competition.
C)The wolf population will become carnivores.
D)The wolf population has excellent biotic potential.
10
You decide to raise mealworms in two identical containers at home. You count the number of mealworms in each container to compare __________.
A)homeostasis
B)parasitism
C)the death rate
D)population densities
11
Your sick puppy is diagnosed with roundworms. What type of symbiotic relationship do the puppy and the roundworms have?
A)cooperative
B)commensalism
C)parasitism
D)mutualism
12
In the year 2000, what was Earth's human population?
A)more than 16 billion
B)less than 2 billion
C)about 6 billion
D)exactly 1.6 billion
13
The organisms living in an area and the nonliving features of that environment form __________.
A)its limiting factors
B)competition
C)a symbiotic relationship
D)an ecosystem
14
Which of these is a method used to count a wildlife population?
A)study-a-niche
B)recommended spacing
C)trap-mark-release
D)commensalism
15
Which of these is true for human populations?
A)Countries with higher birthrates than death rates have growing populations.
B)Countries always have higher birth-rates than death rates.
C)Countries with low death rates will always have high birthrates.
D)Countries with higher death rates than birth-rates will increase their population size.
16
Earth's surrounding atmosphere is part of its __________.
A)niche
B)population
C)food chains
D)biosphere
17
All the tortoises living in a specific region of a desert ecosystem make up a __________.
A)biosphere
B)population
C)food chain
D)carrying capacity
18
The largest number of organisms in a species that can live in an ecosystem at one time is its __________.
A)sample count
B)commensalism
C)carrying capacity
D)symbiosis
19
A pig is which kind of consumer?
A)omnivore
B)carnivore
C)herbivore
D)decomposer
20
Clown fish swim among a sea anemone's tentacles without being stung. What type of symbiotic relationship do the clown fish and the sea anemone have?
A)commensalism
B)parasitism
C)mutualism
D)consumerism
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