6.1.3 Test Review

Which of the following is a biotic component of an ecosystem?

• cactus

• sunlight

• water

• carbon dioxide

Answer explanation

BIOTIC means LIVING. The cactus is the only answer that is a living organism.

Tags

abiotic/biotic factors in an ecosystem

If insects were removed from an ecosystem, what would the affect be? Check ALL that apply.

• plants the insects eat would increase in population

• organisms that eat the insects would decrease in population

• if the insects are decomposers, some abiotic cycles would be disrupted

• there would be no noticeable change to the ecosystem

Answer explanation

ALL organisms are affected by a change to the ecosystem. Some changes can even disrupt the abiotic nutrient cycles.

Tags

interdependence

What is the correct order for the levels of organization from SMALLEST to LARGEST?

• population, organism, ecosystem, community

• ecosystem, community, population, organism

• organism, community, population, ecosystem

• organism, population, community, ecosystem

Answer explanation

organism is an individual - it is the smallest component of an ecosystem. populations are made of organisms of the same species, in the same place, at the same time. communities are composed of multiple populations, and ecosystems contain all the living and nonliving (abiotic) components of the environment.

Tags

levels of organization - ecosystems

Which of the following would determine the success of a population in a given environment? Check ALL that apply.

• its biotic needs are met - it has access to food or an energy source

• its abiotic needs are meet - it has access to sunlight, water, shade, shelter, etc.

• it has adaptations that allow it to successfully survive in its given environment

• Most organisms survive to reproductive age

Answer explanation

All answer choices are correct. The population is dependent on the abitioc and biotic components available in its environment. It must have adaptations that allow the individual organisms to survive to a reproductive age to allow the population to continue to be successful.

Tags

interdependence

How does a drought affect a grassland ecosystem? Check ALL that apply.

• plant populations decrease

• organisms that rely on the plants will die or move away

• predator populations increase

• decomposers die off

Answer explanation

Plants are the foundation of a food web. If the producers die off, all other populations will decrease or organisms will be forced to move away to find another food source.

Tags

interdependence

How would you label the picture?

• organism

• population

• community

• ecosystem

Answer explanation

an organism is an INDIVIDUAL biotic factor in the ecosystem.

Tags

levels of organization - ecosystems

How would you label the picture?

• organism

• population

• community

• ecosystem

Answer explanation

a population contains multiple organisms of the same species, in the same place, at the same time.

Tags

levels of organization - ecosystems

How would you label the picture?

• organism

• population

• community

• ecosystem

Answer explanation

A community includes all of the populations in a given area.

Tags

levels of organization - ecosystems

How would you label the picture?

• organism

• population

• community

• ecosystem

Answer explanation

an ecosystem includes all of the ABIOTIC and BIOTIC factors in a given environment.

Tags

levels of organization - ecosystems

Which of the following are characteristics UNIQUE to the plant kingdom?

• autotrophic AND unicellular

• cell wall AND chloroplasts

• heterotrophic AND multicellular

• multicellular AND asexual reproduction

Answer explanation

Plants have a cell wall made of cellulose and chloroplasts where the process of photosynthesis occurs.

Tags

classification of kingdoms