N5Bio U3 KA1+2

What does an ecosystem consist of?

• Only the living organisms in a habitat

• Only the non-living components in a habitat

• Both the living organisms and the non-living components in a habitat

• Only the predator and prey relationships in a habitat

What is a niche in an ecosystem?

• A type of habitat within an ecosystem

• The role an organism plays within a community, including its use of resources and interactions with other organisms

• A specific type of food chain

• The largest organism in an ecosystem

What could be the effect of removing an organism(s) from a food web?

• It has no effect on the food web

• It can disrupt the interactions of organisms in the food web

• It increases the biodiversity of the food web

• It changes the climate of the ecosystem

Which type of competition is more intense?

• Interspecific competition

• Intraspecific competition

• Competition for abiotic factors

• There is no difference in competition intensity

What are considered biotic factors in the distribution of organisms?

• Light intensity, moisture, pH, and temperature

• Disease, food availability, grazing, and predation

• Temperature and light intensity only

• pH and moisture only

Which of the following is NOT an abiotic factor?

• Light intensity

• Moisture

• Disease

• pH

How can one measure abiotic factors such as light intensity and soil moisture?

• Using pH meters or chemical tests

• Using temperature probes linked to appropriate data logging software

• Using light meters, moisture meters, and pH meters

• you can't do this, it's impossible

What is the purpose of using quadrats and pitfall traps in the study of organisms?

• To identify organisms using paired-statement keys

• To indicate environmental quality/levels of pollution

• To sample plants and animals and evaluate limitations and sources of error in their use

• To research human activities which cause species to become endangered

What can the presence or absence of indicator species reveal?

• The abundance of plants/invertebrates in an area

• Environmental quality/levels of pollution

• The effect of light/moisture on the abundance of plants

• The distribution of a species in an ecosystem using a line transect

Which factors can cause a change in biodiversity?

• Biotic and abiotic factors

• Sampling methods like quadrats and pitfall traps

• Paired-statement keys

• Indicator species