IB Study Guide 1: Areas and Ecosystems
5. 1 Communities and Ecosystems (Core)
5. 1 . 1Define kinds, habitat, populace, community, environment, and ecology.
Kinds вЂ“ A species can be described as group of creatures with similar characteristics, which could interbreed and produce viable, fertile children.
An environment вЂ“ A habitat is the environment where a species normally lives and also the location of any living patient.
Population вЂ“ A inhabitants is a number of organisms of the identical species, whom live in similar area as well.
Community вЂ“ A community is a selection of populations living together and interacting with one another in an region.
Environment вЂ“ An ecosystem can be described as community and its abiotic environment.
Ecology вЂ“ Ecology is a study of relationships in ecosystems вЂ“ both associations between microorganisms and among organisms and the environment. five. 1 . 2Distinguish between autotroph and heterotroph.
Autotrophs are organisms that synthesize their particular organic molecules (food) via simple inorganic substances. More commonly known as suppliers, autotrophs help to make their own meals. In most neighborhoods these makers create their particular food throughout the process of photosynthesis. Meanwhile heterotrophs are microorganisms that get hold of organic substances (food) from all other organisms. There are three several types of heterotrophs. The heterotrophs are represented by the consumers within a community, and can be found on the the top of food chain with the tertiary consumers. five. 1 . 3Distinguish between buyers, detrivores, and saprotrophs. You will find three types of heterotrophs including buyers, detrivores, and saprotrophs. Individuals are organisms that ingest organic and natural matter that is living or perhaps recently wiped out. Consumers are likewise split into 3 categories: principal, secondary, and tertiary customers. Primary customers directly ingest producers. Secondary consumers ingest primary customers as well as makers. Tertiary individuals are at the top of the foodstuff web and may consume some other consumers or producers. Detrivores ingest deceased organic matter. And saprotrophs live on or perhaps in deceased organic matter, secreting enzymes into it and absorbing the items of digestive function. 5. 1 . 4Describe precisely what is meant simply by food chain, giving three examples, every single with in least 3 linkages (four organisms).
A foodstuff chain is definitely visual portrayal of sequences of trophic relationships, exactly where each member in the sequence nourishes on the earlier one. Trophic relationships are incredibly important вЂ“ where one particular population of organism passes on an additional population. Case: Producer Main consumer Second consumer Tertiary consumer
5. 1 . 5Describe what is meant by a food internet.
A food internet is a picture of all the nourishing relationships within a community. The arrows show the course of flow of energy. five. 1 . 6 Define trophic level.
Trophic level вЂ“ The trophic level of a great organism is definitely its position inside the food string. Examples of this are producers, primary customers, secondary consumers, and tertiary consumers. a few. 1 . 7Deduce the trophic level of an organism within a food string or food web.
Photosynthetic microorganisms including plant life, or all autotrophs, will be producers in a food net. Primary consumers are organisms that eat the particular producers. Second consumers after that eat the principal consumers. And in turn the tertiary consumers take in the second consumers. 5. 1 . 8 Construct a food net containing approximately 10 creatures, using suitable information.
5. 1 . 9State that light is a initial power source in all residential areas.
In almost all neighborhoods the makers make organic and natural matter through the process of photosynthesis. This making light is definitely the initial energy source for the whole community. Producers convert light energy into the substance energy of sugars and other organic substances 5. 1 ) 10 Make clear the energy movement in a foodstuff chain.
Sunlight offers energy in organic subject to producers through the process of...