Question

a group of organisms living together on a rocky beach is an example of a(n).
population.
individual.
community.
colony.
ecosystem.
question 13
2 pts
13
the term ecosystem best encompasses which of the following?
populations in one area but not the physical environment
all living organisms living in one area without regards to the physical setting
the community or communities but not the physical environment
populations and communities living in one area
the community or communities and the physical environment

Explanation:

First Question (About Organisms on Rocky Beach)

• A population is a group of the same species, so not multiple organisms (different species likely) here.
• An individual is one organism, not a group.
• A community is all populations (different species) in an area, which matches a group of organisms (different species) on a rocky beach.
• A colony is a group of the same species (like coral), not diverse organisms.
• An ecosystem includes physical environment too, but the question is about organisms living together, so community is better.

• An ecosystem includes both biotic (living: communities/populations) and abiotic (physical environment) components.
• Option 1: Wrong, as ecosystem includes physical environment.
• Option 2: Wrong, ignores physical setting.
• Option 3: Wrong, ecosystem includes physical environment.
• Option 4: Wrong, misses physical environment.
• Option 5: Correct, as it includes communities (biotic) and physical environment (abiotic).

Answer:

C. community.

Question 13 (Ecosystem Definition)