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Thursday, February 28, 2013

Key Terms

Saprophyte/ Saprotroph : organisms that feed on dead or decomposing genuine (e.g. Fungus)

Autotroph: Makes their own food (e.g. Plants)

Heterotrophic: Feeds on another(prenominal) living things (e.g. Animals)

Viviparous: Gives birth to live young (e.g. Mammals)

heterothermic - their body temperature matches that of the surroundings

Common Ancestor a species from which we have evolved from

intercrossed when two species that be closely related mate and make water an offspring It is normally sterile but in the role of the mallard duck or an Arctic gull (fertile)

binomial System…Genus followed by Species… a two name schema adopted by scientists to get commonality in assigning species.

Biodiversity..variety of species in an sports stadium

Dichotomous Keys …is a device used to sponsor scientists identify an organism..at each stage they are making a choice from 2 options

Continuous Variation..where a bear shows differences across a weave from one extreme to the other with scores of intermediates

Normal Distribution….where the majority of individuals showing a feature are found somewhere in the middle of the range (the norm).

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As one goes to the extremes fewer individuals display this feature

Ring Species: hybrids of an initial organism can interbreed, however the further away the hybrids go in terms of variation from the original, the less likely they will interbreed with each other.

Huddling: enables penguins in extreme environments to keep impassioned by trapping heat and reducing the surface area by which heat can be lost

Hydrothermal Vents: Underwater volcanic exit holes where poisonous fumes, gritty temperatures, an absence of light and high pressure make it difficult to sustain life

Speciation: where new species are formed from an existing species normally by a geographical barrier forming

Subspecies : You may get different versions of the alike species

Mutations: change in the DNa/ genes of an organism

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