Principles of Animal Biology |
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acid Amphibia anatomy animals Annelida appendages Arachnids arteries Arthropod behaviour biology birds blood body bones called capillary cavity cells characteristic characters ciliated Class colour crossed Crustacea Darwin dorsal double recessive Drosophila embryo epithelium evolutionary experiment experimental fact factors females fertilised fibres fishes fowl frog gametes ganglion Genera genes genetic gill glands gonads grey heart hereditable properties individuals inheritance insects Lamarckian land Vertebrates large number larvæ limbs Linnæus living matter lungs male Mammals mated melanophores Mendel microscopic Mollusca mouth muscle muscular mutant Natural Selection nerve notochord offspring organs oxygen pair of chromosomes parents phylum pigment plants principle purple receptor red-eyed reflex reptiles result scorpion segments side single skeleton skin skull species sperm stage stimulation striped muscle structure tadpole tion tissue toads Trilobites tube Unity of Type veins ventral Vertebrates vestigial walnut white-eyed wild type yolk yolk plug