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