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Frage 1
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What is the definition of species?
Antworten
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a community and its abiotic environment
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a group of organisms that can interbreed and produce fertile, viable offsrping
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a group of organisms of the same species in the same area at the same time
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organisms that live in or on non-living matter, secreting digestive enzymes into it and absorbing the produce from digestion
Frage 2
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What is a population?
Antworten
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a group of organisms of the same species in the same area at the same time
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the environment a species normally lives or the location of a living organism
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the study of relationships between living organisms and organisms and their environment
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a community and its abiotic environment
Frage 3
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What is ecology?
Antworten
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a group of organisms of the same species in the same area at the same time
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the environment a species normally lives or the location of a living organism
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the study of relationships between living organisms and organisms and their environment
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a community and its abiotic environment
Frage 4
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What is a habitat?
Antworten
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a group of organisms of the same species in the same area at the same time
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the environment a species normally lives or the location of a living organism
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the study of relationships between living organisms and organisms and their environment
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a community and its abiotic environment
Frage 5
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What is an ecosystem?
Antworten
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a group of organisms of the same species in the same area at the same time
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the environment a species normally lives or the location of a living organism
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the study of relationships between living organisms and organisms and their environment
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a community and its abiotic environment
Frage 6
Frage
What is an autotroph?
Antworten
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an organism that obtains organic molecules from other organisms
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an organism that digests non-living matter
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an organism that synthesises organic molecules as its food source
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an organism that obtains food by feeding on living/recently killed matter
Frage 7
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What is a heterotroph?
Antworten
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an organism that obtains food by feeding on living/recently killed matter
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an organism that obtains organic molecules from other organisms
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an organism that synthesises organic molecules as its food source
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an organism that ingests non-living matter
Frage 8
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What is a detritivore?
Antworten
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an organism that ingests non-living matter
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an organism that obtains food by feeding on other organisms
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an organism that lives on/in non-living matter, secreting digestive enzymes into it and absorbing the produce from digestion
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an organism that synthesises organic molecules for it food source
Frage 9
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What is a saprotroph?
Antworten
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an organism that lives on/in non-living matter, secreting digestive enzymes into it and absorbing the produce from digestion
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an organism that ingests non-living matter
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an organism that obtains organic molecules from other organism
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an organism that obtains food by feeding on living/recently killed matter
Frage 10
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What is a saprotroph?
Antworten
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an organism that lives on/in non-living matter, secreting digestive enzymes into it and absorbing the produce from digestion
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an organism that ingests non-living matter
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an organism that obtains organic molecules from other organism
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an organism that obtains food by feeding on living/recently killed matter
Frage 11
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What is a consumer?
Antworten
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an organism that obtains food by feeding on living/recently killed matter
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a group of populations living and interacting with each other in an area
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an organism that ingests non-living matter
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a group of organisms of the same species in the same area at the same time
Frage 12
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What is a community?
Antworten
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a group of populations living and interacting with each other in an area
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a group of organisms of the same species in the same place at the same time
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the environment a species normally lives or the location of a living organism
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a community and it abiotic environment
Frage 13
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Describe what is meant by a food chain. Tick three answers
Antworten
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A food chain shows the linear feeding relationships between species in a community
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A food chain shows the interaction between species in a habitat
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The arrows represent the transfer of energy and matter as one organism is eaten by another
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The first organism in the sequence is the consumer, followed by producers
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The first organism in the sequence is the producer, followed by consumers
Frage 14
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Describe what is meant by a food chain. Tick two answers
Antworten
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A food web is a diagram that shows how food chains are linked together into more complex feeding relationships within a community
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There can only be one producer in a food web. The consumers can occupy multiple positions in the trophic levels
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There can be more than one producer in a food web, and consumers can occupy multiple positions in the trophic levels
Frage 15
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A trophic level refers to an organism's position in a food chain
Antworten
- True
- False
Frage 16
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Deduce the trophic level(s) of the waterweed, frog and kingfisher
Image:
food_web_med (image/jpeg)
Antworten
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waterweed = 1 frog = 3 kingfisher =4
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waterweed = 1 frog = 3,4 kingfisher =4
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waterweed = 1 frog = 3,4 kingfisher =3,4,5
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waterweed = 1 frog = 3,4 kingfisher =3,4
Frage 17
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Explain the energy flow in a food chain. Tick 4.
Antworten
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Energy enters most communities as light, where it is absorbed by autotrophs (e.g. plants) and converted into chemical energy via photosynthesis
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Energy enters most communities as light, where it is absorbed by heterotrophs (e.g. animals) and converted into chemical energy via photosynthesis
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Only ~10% of energy is passed from one trophic level to the next, the rest is lost
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Energy then gets passed to the primary consumer (herbivore) when they eat the plant, and then gets passed to successive consumers (carnivores) as they are eaten in turn
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Because ~90% of energy is lost between trophic levels, the number of trophic levels are limited as energy flow is reduced at higher levels
Frage 18
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why is light the initial energy source for almost all communities?
Antworten
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All green plants, and some bacteria, use light as a source of energy for synthesising organic molecules
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All green plants, animals, and some bacteria, use light as a source of energy for synthesising organic molecules
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All green plants, and bacteria, use light as a source of energy for synthesising organic molecules
Frage 19
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Why is the energy transformation presented as a pyramid?
Antworten
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The energy transfer is never 100% efficient
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Each level of the pyramid of energy should be approximately one tenth the size of the level preceding it, as energy transformations are ~10% efficient
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Typically, energy transformations in living things are ~90% efficient, with about 10% of the energy lost between trophic levels
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Pyramids of energy will never appear inverted as some of the energy stored in one source is always lost when transferred to the next source
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This energy may be lost as heat, be used up during cellular respiration, be excreted in faeces or remain unconsumed as the uneaten part of food
Frage 20
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The saprotrophic activity of decomposers (certain bacteria and fungi), free inorganic materials from the dead bodies and waste products of organisms, ensuring a continual supply of raw materials for the producers (which can then be ingested by consumers)
Antworten
- True
- False
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