Ecosystems 8.11B MM Question Preview (ID: 41236)
A.
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Giraffes and elephants are herbivores that live in grassland communities. How is it possible for the populations of both species to survive in the same community?
a) They do not live in the same place.
b) They occupy different niches.
c) They become omnivores when food is scarce.
d) They complete for the same resources.
Which best describes the relationship between the size of a population and competition for resources?
a) When population density is low, competition for resources does not exist.
b) When population density is high, competition for resources is low.
c) When population density is high, competition for resources is high.
d) When population density is low, competition for resources is high.
Which example describes organisms competing for an abioitic factor?
a) Male elephant seals compete on a beach for mates.
b) Brighly colored flowers attract pollinators.
c) Cacti compete for water in the desert.
d) Lions and hyenas compete for a downed zebra.
What might happen to animals if abiotic resources decrease in an ecosystem?
a) The animal populations are not affected because abiotic resources are not necessary for survival.
b) All the animals perish.
c) Some animals perish, while others migrate to a new location.
d) All animals migrate to a new location.
If someone replenishes the tree population in a forest ecosystem, how might this affect the producers already living there?
a) aIncrease in competition for biotic factors
b) Decrease in competition for abiotic factors
c) Increase in competition for abiotic factors
d) Decrease in competition for biotic factors
Sunlight is extremely important for the development and growth of coral. This important factor of survival for the coral reef is...
a) symbiotic
b) biotic
c) abiotic
d) parasitic
The climate where two species of wolves lives suddenly changes very cold to a warm climate. Species X has long fur and does not shed to regulate internal temperature. Species Y has short fur and does shed. Which species will survive?
a) Species X because its fur will help it stay cool.
b) Species Y because it shed fur to help maintain constant internal temperatures.
c) Species X because it can move around the environment to stay cool.
d) Both species will survive because they have fur to help maintain constant internal temperatures.
Organisms such as prairie dogs, foxes, black-footed ferrets, and grasses are commonly found in prairie ecosystems. Which organism does NOT compete with other organisms for food?
a) prairie dog
b) fox
c) black-footed ferret
d) grass
Scientists study and ecosystem devastated by drought and observe the interactions of organisms in relatin to food, light, water, and mates. Which hypothesis statement related to the investigation?
a) If available resources increase, then competition will increase.
b) If the drought continues, then competition will decrease.
c) If available resources decrease, then competition will increase.
d) If available resources remain constant, then competition will decrease.
Africanized honeybees are genetically engineered bees that escaped fro a research lab in Brazil. They are aggressive and are slowly replacing native species in Brazillian rainforests. Which statement explains competition between the bee species?
a) The native species are not reproducing as fast as the Africanized bees due to parasites.
b) The two species occupy the same ecological niche and compete for abiotic factors only.
c) The Africanized bees kill the native bees.
d) The Africanized bees deplete resources native bees need to survive.
A pedologist is a scientist who studies, evaluates, and interprets the quality of soil. The scientist most interested in the findings of a pedologist would probably be a...
a) physicist
b) astronomer
c) botanist
d) meteorologist
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