- Vertebrates: These are higher organisms in the kingdom Animalia that have a distinct spinal cord, i.e., a vertebra (notochord). Vertebrates include bony fishes, amphibians, reptiles, birds and mammals.
- Invertebrates: Invertebrates are organisms of the kingdom Animalia that do not have a vertebral column. Invertebrate organisms include insects, arthropods, molluscs, worms, annelids and protozoans.
- Biodiversity: Biodiversity is the variation of different life forms present in any specified region, area, niche, biome and even planet. The variation includes genetic variations, specie variations and ecosystem variations.
- Nexus: A nexus is a gap junction that acts as intracellular connections between two cells. Nexus ...