IB Biology Chapter 4 Review: Ecology

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

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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

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What are characteristics of species?

• I and II

• I and III

• II and III

• I, II and III

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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

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The diagram represents a pyramid of energy. What level does the letter X represent?

• Light

• Primary consumers

• Abiotic environment

• Producers

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What is the classification of an organism that is able to make organic compounds from inorganic nutrients?

• Autotroph

• Consumer

• Detritivore

• Saprotroph

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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

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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

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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

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