Ecology
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Species, Communities, and Ecosystems
SubtopicSpecies, Communities, and Ecosystems under Ecology for Grade 11 IB.
Preview questions (no answers)
- 1.
Which of these contributes to the acidity of water in peat bogs?
A.High levels of oxygen
B.Anaerobic respiration by bacteria and partial decomposition
C.Abundant sunlight
D.Rapid flow of river water
- 2.
When sunlight reaches the Earth's surface, most of it is converted into which form before being re-radiated?
A.Ultraviolet light
B.Chemical energy
C.Heat (Infrared radiation)
D.Nuclear energy
- 3.
Which of the following is a major source of carbon dioxide for the atmosphere?
A.Photosynthesis by algae
B.Cellular respiration by all living organisms
C.Formation of limestone
D.Peat accumulation in bogs
Download the worksheet for Ecology - Species, Communities, and Ecosystems to practice offline. It includes additional chapter-level practice questions.
Preview questions (no answers)
- 1.
Which of the following is the best definition of a primary consumer?
A.An organism that feeds directly on producers
B.An organism that is the first to be born in a season
C.An organism that converts light into food
D.An organism that eats secondary consumers
- 2.
Which of the following is a common unit for measuring biomass in a small-scale ecosystem study?
A.Liters per hectare
B.Grams per square meter ()
C.Volts per organism
D.Degrees Celsius
- 3.
Which substance produced by plants contains the chemical energy that is passed to consumers?
A.Chlorophyll
B.Oxygen
C.Carbohydrates
D.Water
Download the worksheet for Ecology - Energy Flow to practice offline. It includes additional chapter-level practice questions.
Preview questions (no answers)
- 1.
What is the primary way that carbon enters the food chain?
A.Through the eating of animals
B.Through the uptake of by plants
C.Through the drinking of water
D.Through the absorption of minerals by roots
- 2.
What happens to the released by a cow during respiration?
A.It is immediately turned into peat
B.It diffuses into the surrounding atmosphere
C.It is stored in the cow's hooves
D.It is converted into limestone
- 3.
Which of these is a significant carbon reservoir in the ocean?
A.Atmospheric dust
B.Coral reefs
C.Floating plastic
D.Pure nitrogen gas
Download the worksheet for Ecology - Carbon Cycling to practice offline. It includes additional chapter-level practice questions.
Preview questions (no answers)
- 1.
Which of the following best describes the trend in atmospheric carbon dioxide since the 1960s, as measured at Mauna Loa?
A.A steady decrease in concentration.
B.A steady increase in concentration with annual fluctuations.
C.A constant concentration with no change.
D.A random pattern with no clear trend.
- 2.
What is the primary way that carbon dioxide is removed from the atmosphere by the ocean?
A.It is used by fish for respiration.
B.It dissolves into the surface water.
C.It is frozen into icebergs.
D.It is turned into salt by underwater volcanoes.
- 3.
Which statement about the greenhouse effect is true?
A.It is only caused by man-made chemicals.
B.It is essential for maintaining temperatures that support life.
C.It involves the trapping of short-wave ultraviolet light.
D.It has only been occurring for the last 50 years.
Download the worksheet for Ecology - Climate Change to practice offline. It includes additional chapter-level practice questions.