Week 2 Quest

Which phrase is an example of autotrophic nutrition?

• a cow eating grass in a field

• a mushroom digesting a dead log

• an apple tree making its own food

• a tapeworm in the body of a dog

Autotrophs might survive when heterotrophs cannot, because autotrophs are able to

• reproduce sexually

• become dormant

• exist without respiration

• make their own food

• They convert light energy into chemical energy.

• They carry-out a food making process, using inorganic raw materials

• They break down dead organisms, releasing raw materials into the environment

• They act as catalyst to speed up the energy flow between organisms.

Which sequence shows a correct pathway for the flow of energy in a food chain?

• bacteria -> grass -> fox -> owl

• grass -> grasshopper -> frog -> snake

• fungi -> beetle -> algae -> mouse

• algae -> snake -> duck ->deer

Which type of model provides the most complete representation of the feeding relationships within a community?

• a material cycle

• a predator-prey association

• a food chain

• a food web

Which relationship best describes the interactions between lettuce and a rabbit?

• predator-prey

• producer-consumer

• parasite-host

• decomposer-scavenger

• an increase in the autotroph populations

• a decrease in the duck population

• an increase in the raccoon population

• a decrease in pathogens of carnivorous fish

A food web is more stable than a food chain, because a food web

• transfers all of the producers energy to the herbivores

• reduces the number of niches in the ecosystem

• includes alternative pathways for energy flow

• includes more consumers than producers

Puppies are often given medicine to eliminate

roundworms from their intestines. These worms consume some of the food the puppies have digested. The worms and the puppies represent a relationship known as

• predator-prey

• consumer-producer

• parasite-host

• autotroph-heterotroph

• decomposer

• producer

• carnivore

• parasite