Test
Communities and Ecosystems
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Preguntas del test (20)
1What is the definition of species?
- Aa community and its abiotic environment
- Ba group of organisms that can interbreed and produce fertile, viable offsrping
- Ca group of organisms of the same species in the same area at the same time
- Dorganisms that live in or on non-living matter, secreting digestive enzymes into it and absorbing the produce from digestion
2What is a population?
- Aa group of organisms of the same species in the same area at the same time
- Bthe environment a species normally lives or the location of a living organism
- Cthe study of relationships between living organisms and organisms and their environment
- Da community and its abiotic environment
3What is ecology?
- Aa group of organisms of the same species in the same area at the same time
- Bthe environment a species normally lives or the location of a living organism
- Cthe study of relationships between living organisms and organisms and their environment
- Da community and its abiotic environment
4What is a habitat?
- Aa group of organisms of the same species in the same area at the same time
- Bthe environment a species normally lives or the location of a living organism
- Cthe study of relationships between living organisms and organisms and their environment
- Da community and its abiotic environment
5What is an ecosystem?
- Aa group of organisms of the same species in the same area at the same time
- Bthe environment a species normally lives or the location of a living organism
- Cthe study of relationships between living organisms and organisms and their environment
- Da community and its abiotic environment
6What is an autotroph?
- Aan organism that obtains organic molecules from other organisms
- Ban organism that digests non-living matter
- Can organism that synthesises organic molecules as its food source
- Dan organism that obtains food by feeding on living/recently killed matter
7What is a heterotroph?
- Aan organism that obtains food by feeding on living/recently killed matter
- Ban organism that obtains organic molecules from other organisms
- Can organism that synthesises organic molecules as its food source
- Dan organism that ingests non-living matter
8What is a detritivore?
- Aan organism that ingests non-living matter
- Ban organism that obtains food by feeding on other organisms
- Can organism that lives on/in non-living matter, secreting digestive enzymes into it and absorbing the produce from digestion
- Dan organism that synthesises organic molecules for it food source
9What is a saprotroph?
- Aan organism that lives on/in non-living matter, secreting digestive enzymes into it and absorbing the produce from digestion
- Ban organism that ingests non-living matter
- Can organism that obtains organic molecules from other organism
- Dan organism that obtains food by feeding on living/recently killed matter
10What is a saprotroph?
- Aan organism that lives on/in non-living matter, secreting digestive enzymes into it and absorbing the produce from digestion
- Ban organism that ingests non-living matter
- Can organism that obtains organic molecules from other organism
- Dan organism that obtains food by feeding on living/recently killed matter
11What is a consumer?
- Aan organism that obtains food by feeding on living/recently killed matter
- Ba group of populations living and interacting with each other in an area
- Can organism that ingests non-living matter
- Da group of organisms of the same species in the same area at the same time
12What is a community?
- Aa group of populations living and interacting with each other in an area
- Ba group of organisms of the same species in the same place at the same time
- Cthe environment a species normally lives or the location of a living organism
- Da community and it abiotic environment
13Describe what is meant by a food chain. Tick three answers
- AA food chain shows the linear feeding relationships between species in a community
- BA food chain shows the interaction between species in a habitat
- CThe arrows represent the transfer of energy and matter as one organism is eaten by another
- DThe first organism in the sequence is the consumer, followed by producers
- EThe first organism in the sequence is the producer, followed by consumers
14Describe what is meant by a food chain. Tick two answers
- AA food web is a diagram that shows how food chains are linked together into more complex feeding relationships within a community
- BThere can only be one producer in a food web. The consumers can occupy multiple positions in the trophic levels
- CThere can be more than one producer in a food web, and consumers can occupy multiple positions in the trophic levels
15A trophic level refers to an organism's position in a food chain
- AVerdadero
- BFalso
16Deduce the trophic level(s) of the waterweed, frog and kingfisher
- Awaterweed = 1
frog = 3
kingfisher =4 - Bwaterweed = 1
frog = 3,4
kingfisher =4 - Cwaterweed = 1
frog = 3,4
kingfisher =3,4,5 - Dwaterweed = 1
frog = 3,4
kingfisher =3,4
- Awaterweed = 1
17Explain the energy flow in a food chain. Tick 4.
- AEnergy enters most communities as light, where it is absorbed by autotrophs (e.g. plants) and converted into chemical energy via photosynthesis
- BEnergy enters most communities as light, where it is absorbed by heterotrophs (e.g. animals) and converted into chemical energy via photosynthesis
- COnly ~10% of energy is passed from one trophic level to the next, the rest is lost
- DEnergy 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
- EBecause ~90% of energy is lost between trophic levels, the number of trophic levels are limited as energy flow is reduced at higher levels
18why is light the initial energy source for almost all communities?
- AAll green plants, and some bacteria, use light as a source of energy for synthesising organic molecules
- BAll green plants, animals, and some bacteria, use light as a source of energy for synthesising organic molecules
- CAll green plants, and bacteria, use light as a source of energy for synthesising organic molecules
19Why is the energy transformation presented as a pyramid?
- AThe energy transfer is never 100% efficient
- BEach level of the pyramid of energy should be approximately one tenth the size of the level preceding it, as energy transformations are ~10% efficient
- CTypically, energy transformations in living things are ~90% efficient, with about 10% of the energy lost between trophic levels
- DPyramids of energy will never appear inverted as some of the energy stored in one source is always lost when transferred to the next source
- EThis 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
20The 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)
- AVerdadero
- BFalso
Información
- Descripción
- IB (Ecology and Environment) Biology Test sobre Communities and Ecosystems, creado por hanalou el 20/02/2014.
- Autor
- hanalou
- Idioma
- English
- Visitas
- 65
- Etiquetas
- Valoración
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