Biology Unit 2

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Name all 7 classification groups.
Kingdom - Phylum - Class - Order - Family - Genus - Species.
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In how many ways can organisms be classified in?
Two ways - Artificial and Natural Systems.
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What is a Natural System?
A Natural System is based on evolutionary relationships. Animals that are more closely related are more likely to be in the same group.
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What is an Artificial System?
An Artificial System is based on one or two characteristics that make identification easier. E.G. a bird that lives on the sea can be called a seabird.
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All organisms are named by the what?
The Binomial System.
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What is the Binomial System?
Its how all organisms are named.
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How does the Binomial system work?
Two parts to the name. - First is genus and second is species - Genus part starts with a capital letter and species the part starts with a lower-case letter.
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Organisms are classified in discrete groups, this causes problems with...?
Intermediate organisms - Hybrids - Asexual organism.
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What can organisms do?
Eat each other (predators) - Gain from each other (mutualism) - Feed of each other (parasites)
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Who came up with the idea of using the classification system?
Carl Linnaeus.
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What can Pyramids of numbers and biomass both represent.
They can both represent feeding relationships between organisms in a food chain or web.
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Why are Pyramids of biomass hard to construct?
Some organisms feed on organisms different trophic levels.
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Pyramids of biomass can show relationships of what?
They can show feeding relationships.
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What is Trophic?
Trophic is the manner in which energy moves through and ecosystem.
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What does each ecosystem have?
Each ecosystem has its own Trophic System.
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What do Photosynthetic Organisms do?
They capture energy from the sunlight, CO2 and H2O.
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Most producers are what?
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What do Chemosynthetic organisms do?
They capture energy from chemical compounds in the surrounding.
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What do Consumers (Heterotrophs) eat?
They eat only plants and fungi.
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What do Omnivores eat?
Omnivores eat both plant, fungi and animals.
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What do Carnivores eat?
They eat only animals.
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What do Detritivores eat?
They eat dead organic matter.
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What do Decomposers do?
They break down organic matter into similar compounds.
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Name the seven life processes (MRS GREN).
M-Movement, R-Respiration, S-Sensitivity, G-Growth, R-Reproduction, E-Excretion, N-Nutrition.
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What does the recycling of carbon involve?
Photosynthesis - Feeding - Respiration - Decomposition.
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Named the four bacteria responsible for the recycling of Nitrogen.
Bacteria - Nitrifying Bacteria - Denitrifying Bacteria - Nitrogen- fixing bacteria.
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Organism in hot, dry area have adaptations to?
Increase heat loss - Move on sand - Cope with lack of water.
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Organism in cold area have adapted to?
Keep warm - Move on the snow.
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Charles Darwins theory of natural selection involves what?
Variation competition - Survival of the fittest and selective reproduction.
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There is an increase of bad pollutants in the are such as?
Carbon Dioxide which causes global warming - Sulphur Dioxide which cause acid rain and CFCs which break down the ozone layer.
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How is Carbon Dioxide and Sulphur Dioxide released into the air?
By burning fossil fuels, which increases the greenhouse effect and global warming.
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How are CFCs released into the air?
They are released from aerosols.
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Conservation is important to.
Protect our food supply - Prevent damage to food chains - Protect organism for medical uses - Protect habitats for people to visit.
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What is meant by sustainable development?
Sustainable development means taking enough resources from the environment for current needs.
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What are whales used for?
Their skin is used for handbags, belts and shoes. - Their teeth is used for buttons - piano keys and their liver is used in oil.
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Card 2


In how many ways can organisms be classified in?


Two ways - Artificial and Natural Systems.

Card 3


What is a Natural System?


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Card 4


What is an Artificial System?


Preview of the front of card 4

Card 5


All organisms are named by the what?


Preview of the front of card 5
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