Lesson Worksheet: Abiotic and Biotic Factors Biology

In this worksheet, we will practice describing and explaining the effect of biotic and abiotic factors on ecosystems.

Q1:

Conflict can arise between two species or organisms when they both require the same resource. What scientific term is given to this conflict?

  • AParasitism
  • BMutualism
  • CSymbiosis
  • DCompetition
  • EPredation

Q2:

Which of the following statements best defines biotic factors?

  • ABiotic factors are the living factors of an ecosystem.
  • BBiotic factors are the nonliving factors of an ecosystem.
  • CBiotic factors are neither living nor nonliving factors.

Q3:

Which of the following best defines abiotic factors?

  • AAbiotic factors are the living factors of an ecosystem.
  • BAbiotic factors are the nonliving factors of an ecosystem.
  • CAbiotic factors are neither living nor nonliving factors.

Q4:

Factors that affect an ecosystem can be divided into two groups. Complete the sentences with the correct words to describe these factors.

Biotic factors are the factors within an ecosystem.

  • Anonliving
  • Bliving
  • Cinorganic
  • Dorganic

Abiotic factors are the factors within an ecosystem.

  • Ainorganic
  • Bnonliving
  • Cliving
  • Dorganic

Q5:

Which of the following abiotic factors, when decreased, would not decrease the rate of photosynthesis?

  • ALight
  • BOxygen availability
  • CCarbon dioxide availability
  • DTemperature

Q6:

Temperature affects the rate of enzyme-controlled metabolic reactions in organisms. Is this an example of an abiotic or biotic factor?

  • AAbiotic
  • BBiotic
  • CBoth abiotic and biotic
  • DNeither abiotic nor biotic

Q7:

Light intensity affects the growth of plants in an ecosystem. Is this an example of an abiotic or biotic factor?

  • ABiotic
  • BAbiotic
  • CBoth abiotic and biotic
  • DNeither

Q8:

A group of botanists carry out an experiment into the effect of abiotic factors on the growth of a plant. The same species of plant is placed into different conditions, and the growth is recorded after 60 days.

Their results are shown in the table provided.

Soil pHWater Provided (mL) Temperature (C)Plant Growth (cm)
44002590
540025100
64002580
74002550
84002530

Which abiotic factor is limiting plant growth in this experiment?

  • ACarbon dioxide availability
  • BSoil pH
  • CTemperature
  • DWater
  • EOxygen availability

Q9:

The picture provided shows a group of wolves that inhabit Yellowstone National Park. These wolves were introduced into the park to manage the increasing population of elk. What biotic factor do the wolves provide in order to control the population of elk?

Gray Wolfs
  • AAn increase in food availability
  • BCompetition
  • CPredation
  • DParasitism

Q10:

The picture shows cacti plants in the desert. Cacti have adapted a thick, waxy covering and large, fleshy stems. Which abiotic factor, due to its limitation, has encouraged these adaptations?

Saguaro Cactus in Arizona
  • ASunlight
  • BPredation
  • CCarbon dioxide
  • DOxygen
  • EWater

This lesson includes 7 additional questions for subscribers.

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