Life Science: Ecology, Book E

Chapter 1: Interactions of Life

Interactions of Life

Your Results:

The correct answer for each question is indicated by a .

1.			Which of these limits the size of a population? Need a Hint?
			A)	a reduction in living space
			B)	an increased amount of water
			C)	an increase in the number of prey
			D)	a decrease in competition
2.			The organisms living in an area and the nonliving features of that environment form __________. Need a Hint?
			A)	its limiting factors
			B)	a symbiotic relationship
			C)	an ecosystem
			D)	competition
3.			You decide to raise mealworms in two identical containers at home. You count the number of mealworms in each container to compare __________. Need a Hint?
			A)	population densities
			B)	parasitism
			C)	homeostasis
			D)	the death rate
4.			Which of these is true for human populations? Need a Hint?
			A)	Countries with low death rates will always have high birthrates.
			B)	Countries always have higher birthrates than death rates.
			C)	Countries with higher birthrates than death rates have growing populations.
			D)	Countries with higher death rates than birth-rates will increase their population size.
5.			All populations living together in an ecosystem are called a __________. Need a Hint?
			A)	sample count
			B)	biosphere
			C)	community
			D)	predator
6.			The largest number of organisms in a species that can live in an ecosystem at one time is its __________. Need a Hint?
			A)	commensalism
			B)	carrying capacity
			C)	sample count
			D)	symbiosis
7.			Which of these animals has a habitat in the cold northern regions? Need a Hint?
			A)	howler monkeys
			B)	polar bears
			C)	scarlet macaws
			D)	rattlesnakes
8.			Which of these factors helps a population grow? Need a Hint?
			A)	increased numbers of predators
			B)	plenty of water
			C)	limited living space
			D)	reduced amounts of food
9.			A pig is which kind of consumer? Need a Hint?
			A)	decomposer
			B)	carnivore
			C)	herbivore
			D)	omnivore
10.			Your sick puppy is diagnosed with roundworms. What type of symbiotic relationship do the puppy and the roundworms have? Need a Hint?
			A)	cooperative
			B)	commensalism
			C)	mutualism
			D)	parasitism
11.			Which of these is a method used to count the size of a population in a large area? Need a Hint?
			A)	ecology
			B)	photosynthesis
			C)	sample counts
			D)	population density
12.			Which planet is closest to the Sun? Need a Hint?
			A)	Earth
			B)	Mars
			C)	Mercury
			D)	Pluto
13.			Which of these is a method used to count a wildlife population? Need a Hint?
			A)	study-a-niche
			B)	recommended spacing
			C)	trap-mark-release
			D)	commensalism
14.			A salamander's habitat is which of these? Need a Hint?
			A)	the ocean
			B)	a forest floor
			C)	a hollow cactus
			D)	the arctic region
15.			__________ limits population size. Need a Hint?
			A)	Symbiosis
			B)	Mutualism
			C)	Parasitism
			D)	Competition
16.			All the tortoises living in a specific region of a desert ecosystem make up a __________. Need a Hint?
			A)	population
			B)	carrying capacity
			C)	biosphere
			D)	food chain
17.			In the year 2000, what was Earth's human population? Need a Hint?
			A)	less than 2 billion
			B)	more than 16 billion
			C)	exactly 1.6 billion
			D)	about 6 billion
18.			Consumers that capture and eat other consumers are __________. Need a Hint?
			A)	herbivores
			B)	food chains
			C)	producers
			D)	predators
19.			Which of these organisms is a producer? Need a Hint?
			A)	trout
			B)	snake
			C)	fern
			D)	bear
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? Need a Hint?
			A)	mutualism
			B)	commensalism
			C)	parasitism
			D)	consumerism

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