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WorksheetsIB Biology Chapter 4 Review: Ecology
Total questions: 15
Worksheet time: 8mins
Which category of organisms is correctly described in this table?
A
B
C
D
What limits the length of a food chain in an ecosystem?
The size of the individual organisms
Competition between organisms
The loss of energy between trophic levels
Natural selection
What is a feature of shorter wavelength visible radiation?
It includes violet light
It has less energy per photon than longer wavelengths
It is absorbed by greenhouse gases
It is reflected by chlorophyll
What are characteristics of species?
I and II
I and III
II and III
I, II and III
The statement is about the role of some bacteria in ecosystems. What mode of nutrition is described?
They are autotrophs
They are consumers
They are saprotrophs
They are detritivores
The diagram represents a pyramid of energy. What level does the letter X represent?
Light
Primary consumers
Abiotic environment
Producers
What is the classification of an organism that is able to make organic compounds from inorganic nutrients?
Autotroph
Consumer
Detritivore
Saprotroph
How is peat formed?
From methanogenic archeans under anerobic and acidic conditions in deep sea vents
From partially decomposed organic matter under anaerobic and acidic conditions in waterlogged soils
From porous limestone under high pressure, aerobic and alkaline conditions in ocean beds
From bituminous coal under high pressure, anaerobic conditions below ground
What contributes to rising atmospheric concentrations of carbon dioxide and increases average global temperatures?
An increase in shorter wave radiation emitted by the Earth.
An increase in longer wave radiation emitted by the Earth.
An increase in the combustion of fossilized organic matter
The depletion of the ozone in the stratosphere
Nothing - it's all a hoax
What could be represented by arrows 1, 2 and 3?
1 - death of consumers, 2 - cell respiration in saprotrophs, 3 - Cell respiration in producers
1 - death of consumers, 2 - incomplete decomposition, 3 - photosynthesis in producers
1 - cell respiration in saprotrophs, 2 - incomplete decomposition 3 - photosynthesis in producers
1 - cell respiration in consumers, 2 - cell respiration in saprotrophs, 3 - Cell respiration in producers
Methanogens produce methane gas. What is the gas converted to in the atmosphere?
Carbon dioxide and oxygen
Ethanol and carbon dioxide
Carbon monoxide and ozone.
Carbon dioxide and water
A bacterial population with no resistance could develop into a bacterial population with some resistance to an antibiotic. Which event could lead to this?
Antibiotic resistance was inherited from an ancestral population
An antibiotic resistance plasmid is received from a bacterium in another population
The enzyme needed for antibiotic resistance is received from a bacterium in another population
The bacteria have mutated in response to antibiotics in the environment
Euglena is a unicellular organism that feeds on bacteria and uses CO2 as a carbon source. Which described the nutrition of this organism?
Autotrophic only
Heterotrophic only
Saprotrophic only
Autotrophic and heterotrophic
What is lost between trophic levels and cannot be recycled?
Heat
Nitrogen
Carbon compounds
Biomass
Which characteristic of water vapour classifies it as a greenhouse gas?
It absorbs then re-emits some of the long wave radiation emitted by the Earth's surface
It prevents short wave radiation from reaching the Earth's surface
It absorbs UV radiation but does not re-emit it
It absorbs infra-red radiation but does not re-emit it
