The vast majority of energy taken into an ecosystemis____________.
a. converted into biomass by plants.
b. utilized by secondary consumers.
c. lost as heat.
d. used by the primary consumers.
e. concentrated in the decomposers.
A farmer is using an insecticide to treat his crops. While mostinsects do not survive their first exposure to the insecticide somehave a gene that enables them to survive. When these survivorsreproduce they will likely pass along this resistance to theiroffspring. This results in an increase in numbers of the insectsover time. Which of the following processes applies to thissurvival?
a. cloning
b. mutation
c. natural selection
d. genetic engineering
What is the ecological relationship between insects andcrops?
a. mutualism
b. competition
c. predation
Sea anemones growing on the backs of crabs without damaging thecrabs are an example of
a. Parasitism
b. Commensalism
c. Mutualism
Which of these is a population density-independent regulatingfactor?
a. Competition
b. Predation
c. Size of population
d. Weather
e. Resource availability
Producers are_________.
a. Autotrophs
b. Herbivores
c. Omnivores
d. Carnivores
If biological magnification occurs, the ___ will have the highestlevels of toxins in their systems.
a. producers
b. herbivores
c. primary carnivores
d. top carnivores
Given the amount of sunlight that hits the plants on our planet,and the ability of plants for rapid growth and reproduction, howcome we arenât all hip deep in dead plants?
The vast majority of energy taken into an ecosystemis____________.
a. converted into biomass by plants.
b. utilized by secondary consumers.
c. lost as heat.
d. used by the primary consumers.
e. concentrated in the decomposers.
A farmer is using an insecticide to treat his crops. While mostinsects do not survive their first exposure to the insecticide somehave a gene that enables them to survive. When these survivorsreproduce they will likely pass along this resistance to theiroffspring. This results in an increase in numbers of the insectsover time. Which of the following processes applies to thissurvival?
a. cloning
b. mutation
c. natural selection
d. genetic engineering
What is the ecological relationship between insects andcrops?
a. mutualism
b. competition
c. predation
Sea anemones growing on the backs of crabs without damaging thecrabs are an example of
a. Parasitism
b. Commensalism
c. Mutualism
Which of these is a population density-independent regulatingfactor?
a. Competition
b. Predation
c. Size of population
d. Weather
e. Resource availability
Producers are_________.
a. Autotrophs
b. Herbivores
c. Omnivores
d. Carnivores
If biological magnification occurs, the ___ will have the highestlevels of toxins in their systems.
a. producers
b. herbivores
c. primary carnivores
d. top carnivores
Given the amount of sunlight that hits the plants on our planet,and the ability of plants for rapid growth and reproduction, howcome we arenât all hip deep in dead plants?
