NEET BIOLOGY

Detailed explanation-1: -Mammals are a group of vertebrate animals. Examples of mammals include rats, cats, dogs, deer, monkeys, apes, bats, whales, dolphins, and humans.

Detailed explanation-2: -Phylum: Chordata-The Phylum Chordata contains the vertebrate animals. Mammals, birds, reptiles, amphibians and fishes are included in this phylum. These animals have a notochord at some point in their development.

Detailed explanation-3: -Cervidae. Deer are the ruminant mammals forming the family Cervidae. Species in the family include white-tailed deer, mule deer such as black-tailed deer, elk, moose, red deer, caribou, fallow deer, roe deer, pudú and chital.

Detailed explanation-4: -The deer spine normally has seven cervical, 13 thoracic, and six lumbar vertebrae as described in ‘The atlas of animal anatomy’ (Ellenberger et al., 1949) and we chose only those specimens, which had the same number of vertebrae.

Detailed explanation-5: -The phylum chordata (animals with backbones) is divided into five common classes: fish, amphibians, reptiles, mammals and birds.