A) Four-chambered heart. B) Two-chambered heart. C) Three-chambered heart. D) Single chamber heart.
A) Amphibians. B) Fish. C) Reptiles. D) Mammals and birds.
A) To scare predators. B) Flight and insulation. C) Feathers are mainly decorative. D) To help with walking.
A) By burrowing into the ground. B) Using external sources like sun. C) Through metabolic processes. D) By varying their feather count.
A) Fur. B) Feathers. C) Scales. D) Skin.
A) Hearing. B) Smell. C) Vision. D) Taste.
A) Placental mammals. B) Monotremes. C) Marsupials. D) Carnivores.
A) Urethra. B) Nares. C) Cloaca. D) Vagina.
A) Migrating long distances. B) Building nests in trees. C) Parental care of young. D) Laying eggs in water. |