Ecological Factor: Light

Introduction Light is a significant ecological factor. Quality (wavelength or colour), duration (length of day) and intensity (energy input or actual intensity measured in gram calories) of light all influence plants and animals in various ways. Both animals and plants respond to different wavelengths of light. Colour vision occurs in majority of animals including arthropods, […]

Chondrichthyes (Cartilaginous Fishes) Classification

Vertebrate Classification Agnatha Classification Osteichthyes (Bony Fishes) Classification

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