A) competition.
B) a community.
C) an ecosystem.
D) predation.
E) symbiosis.
G) D) and E)
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A) A population with the majority of their population over 50 years of age.
B) A population with its population distributed equally across all age ranges.
C) A population with most of its population under the age of 18 years of age.
D) A population with most of the population in middle age.
E) A population with most of its population over the age of 18 years of age.
G) C) and D)
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A) The Dutch elm disease fungus infects and kills elm trees.
B) The yellow fever virus causes fever and sometimes kills humans.
C) A female tick fastens to the skin of a human host and draws blood for nutrition to make her eggs.
D) The trichina worm burrows into muscle tissue, forms a cyst, and waits to continue its cycle until a predator consumes the host.
E) Unsightly dandelions sprout in a yard and compete with the fescue grass for sunlight.
G) A) and E)
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A) increases.
B) decreases.
C) remains the same.
D) depends on the amount of natural resources.
E) is not related to growth rate increase.
G) A) and C)
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A) Most individuals die of old age.
B) Many individuals die early in life.
C) Individuals die at a constant rate throughout time.
D) Most individuals die during their reproductive years.
E) Most individuals die before old age, but after their reproductive years.
G) A) and C)
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A) mycorrhizal fungal roots on the roots of plants.
B) ants living on the bullhorn acacia tree.
C) termites with protozoa in their digestive tracts.
D) flowering plants and their pollinators.
E) clown fishes in sea anemones.
G) A) and B)
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During secondary succession there is alr...View Answer
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A) accumulation of waste products
B) predation
C) competition
D) limited access to food and water
E) unlimited resources
G) A) and D)
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A) limited food supply
B) accumulation of waste products
C) number of offspring produced per litter
D) predation
E) limited living space
G) None of the above
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A) population growth.
B) biotic potential.
C) environmental resistance.
D) carrying capacity.
E) doubling time.
G) C) and E)
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A) population; community
B) population; ecosystem
C) ecosystem; population
D) community; population
E) ecosystem; community
G) C) and E)
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A) only as viruses, bacteria, and protists.
B) only as viruses, bacteria, protists, and animals; no plants are parasites because they cannot move.
C) only on host animals.
D) only on one host where they can complete their life cycle and disperse to others of that same species.
E) in all kingdoms and sometimes one parasite uses more than one host to disperse.
G) None of the above
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A) A decline in the numbers of predators causes a decline in the number of prey.
B) A decline in the numbers of prey causes a decline in the number of predators.
C) An increase in the number of predators triggers an increase in the number of prey.
D) An up-and-down cycle will be seen for the prey animal.
E) A seasonal die-off that will occur without the other species present.
G) A) and C)
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A) The facilitation model
B) The tolerance model
C) The inhibition model
D) An opportunistic model
E) The climax model
G) C) and D)
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A) habitat.
B) ecological niche.
C) biotic role.
D) abiotic role.
E) ecology.
G) A) and D)
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A) in the lag phase.
B) in the exponential growth phase.
C) in the deceleration phase.
D) in the stable equilibrium phase.
E) at carrying capacity.
G) A) and E)
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A) they, too, are insects so they are opportunistic species.
B) both insects were equilibrium species and resistance was a matter of chance.
C) the predator was an opportunistic species and was therefore more susceptible to the spray.
D) the scale insect was an opportunistic species and the high number of young included a resistant strain; the predator was an equilibrium species and will take longer to produce a resistant variety.
E) they had reached their carrying capacity and thus their numbers decreased due to environmental resistance.
G) A) and C)
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A) the population will continue to grow for some time.
B) environmental resistance is not at work.
C) the biotic potential must be larger than usual.
D) the individuals must be larger than usual.
E) there are many older individuals in a population.
G) B) and C)
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A) death of all the members of one species within a short time.
B) equal numbers of each species persisting for a long time.
C) each species occupying a slightly different niche.
D) hybridization between the two species, resulting in a third species.
E) alternating high numbers of each species as they constantly evolve mechanisms to out compete each other.
G) All of the above
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A) flat.
B) J-shaped.
C) V-shaped.
D) S-shaped.
E) W-shaped.
G) C) and E)
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