Biology Unit 2 Exam Revision Notes
The Five Kingdoms
Prokaryotes E.g. Bacteria
• no nucleus
• loop of naked DNA
• DNA not arranged in linear chromosomes
• no membrane-bound organelles
• smaller ribosome’s than other groups
• carry out respiration on mesosome’s (special membrane systems), not mitochondria
•
Taxonomic Hierarchy
Domain
Kingdom
Phylum
Class
Order
Family
Genus
Species
smaller cells than eukaryotes
• parasitic (some cause disease)
Protoctista E.g. Algae…
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