Biodiversity, Evolution and Classification
You should be prepared to discuss the following:
(a) Biodiversity is the number of different organisms on the planet. Biodiversity varies spatially and over time.
(b) Biodiversity has been generated through natural selection and adaptation over millions of years. Adaptive radiation e.g. Darwin’s finches on the Galapagos.
(c) Organisms are classified into groups based on their evolutionary relationships. Classification places organisms into discrete and hierarchical groups with other closely related species. The need for classification and its tentative nature. Characteristic features of Kingdoms: Prokaryotae, Protoctista, Plantae, Fungi, Animalia.
(d) Animal biodiversity is classified into over 20 major phyla and several minor ones with each phylum containing organisms based on a basic blueprint. Basic features of: Annelids, Arthropods, Chordates. Arthropods are subdivided into four groups (details not required). Some phyla contain many more species than others.
(e) Physical features and biochemical methods can be used to assess the relatedness of organisms. DNA ‘genetic fingerprinting’ and enzyme studies show relatedness without the problem of morphological convergence.
(f) All organisms are named according to the Binomial system. The species concept.
(a) Biodiversity is the number of different organisms on the planet. Biodiversity varies spatially and over time.
(b) Biodiversity has been generated through natural selection and adaptation over millions of years. Adaptive radiation e.g. Darwin’s finches on the Galapagos.
(c) Organisms are classified into groups based on their evolutionary relationships. Classification places organisms into discrete and hierarchical groups with other closely related species. The need for classification and its tentative nature. Characteristic features of Kingdoms: Prokaryotae, Protoctista, Plantae, Fungi, Animalia.
(d) Animal biodiversity is classified into over 20 major phyla and several minor ones with each phylum containing organisms based on a basic blueprint. Basic features of: Annelids, Arthropods, Chordates. Arthropods are subdivided into four groups (details not required). Some phyla contain many more species than others.
(e) Physical features and biochemical methods can be used to assess the relatedness of organisms. DNA ‘genetic fingerprinting’ and enzyme studies show relatedness without the problem of morphological convergence.
(f) All organisms are named according to the Binomial system. The species concept.
Revision Powerpoint and revision workbook
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Summary notes on topic 2.1
wjec_by2.1_evolution.docx | |
File Size: | 304 kb |
File Type: | docx |
New Scientist
Keep yourself up to date and well informed using these New Scientist articles relevant to this topic.
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Khan Academy - Evolution and Natural SelectionThe full series of lectures, giving great background on this topic, can be viewed by clicking here. Watch them and you will be a total expert so will breeze through this topic.
Khan Academy - Classification and Taxonomy |
Crash Course Biology - EvolutionThese two videos will help give you an overview of this topic.
Bozeman Biology - Classification |