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Kerala PSC General Science Book Study Materials Page 413
Book's First PageHeredity Evidence from Connecting Links All organisms on earth possess a genetic Connecting Links Between groups system that is based on the replication of a Virus living and non-living organism long, complex molecule called DNA. This Euglena plants mechanism allows for adaptation and (Protozoa) and animals evolution over time, also distinguishing Balanoglossus invertebrates characteristics of living things. (Chrodata) and chordates Peripatus arthropods (Anthropoda) and annelids Neopilina annelids (Mollusca) and molluscans Protopterus fishes (Lung fish) and amphibians Chimaera cartilaginous and bony fishes THEORIES OF EVOLUTION Lamarckism (Lamarckian inheritance) Jean-Baptiste Lamarck was a French scientist 1. A characteristic which is used more and who developed an alternative theory of more by an organism becomes bigger and evolution in 1801 and 1809. His theory stronger, and one that is not used involved two ideas: eventually disappears 2. Any feature of an organism that is improved through use is passed to its offspring. 412