Question

whole class re-engagement on ls.8.2.2 exit ticket
question 1 — dok 1 (recall / identify) skill: identify ecosystem roles
which organism’s primary role is to break down dead organisms and recycle nutrients in an ecosystem?
a. grass b. rabbit c. fox d. fungus

question 2 — dok 2 (conceptual understanding) skill: distinguish types of interactions
which statement best explains why predator–prey relationships are not considered competition?
a. predators and prey both benefit from the interaction
b. predators and prey use different habitats
c. predators benefit while prey are harmed
d. both organisms are harmed while using the same resource

question 3 — dok 4 (systems thinking & synthesis) skill: summarize multiple interactions and consequences
in an ecosystem, a parasite population increases rapidly and begins killing its hosts faster than usual.
which explanation best describes why this change could harm both populations over time?
a. parasites depend on hosts surviving long enough to reproduce
b. hosts will evolve immunity immediately
c. decomposers will replace the parasites’ role
d. competition between parasites will decrease

question 4 — dok 3 (reasoning across interactions) skill: explain consequences of competition and predation
two species of birds live in the same forest and both eat the same insects. over time, one species begins feeding higher in the tree can while the other feeds closer to the ground.
which conclusion best explains this change?
a. the birds are forming a mutualistic relationship
b. one species is becoming parasitic on the other
c. competition is leading to niche separation that allows coexistence
d. predation pressure is forcing one species to leave the ecosystem

question 5 — dok 4 (synthesis / systems thinking) skill: construct a system-level explanation
in a forest ecosystem, bees pollinate flowers while collecting nectar. if the bee population declines sharply, which combined ou likely?
a. flower populations increase due to less competition
b. producers lose pollination support, reducing reproduction
c. decomposers replace bees in pollination
d. energy flow becomes more efficient

Explanation:

Question 1

Decomposers break down dead organisms and recycle nutrients. Grass is a producer, rabbit and fox are consumers. Fungus is a decomposer.

Competition is when organisms fight for the same resource (both harmed). Predator - prey: predator benefits, prey is harmed. Option C explains this, so predator - prey is not competition.

Parasites need hosts to survive long enough to reproduce. If parasites kill hosts too fast, they'll run out of hosts. Hosts evolving immunity immediately is unlikely. Decomposers don't replace parasites' role. Less competition among parasites doesn't harm both populations.

Answer:

D. Fungus

Question 2