A) Four-chambered heart. B) Two-chambered heart. C) Three-chambered heart. D) Single chamber heart.
A) Amphibians. B) Reptiles. C) Mammals and birds. D) Fish.
A) To help with walking. B) Flight and insulation. C) To scare predators. D) Feathers are mainly decorative.
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) Vision. B) Hearing. C) Taste. D) Smell.
A) Carnivores. B) Monotremes. C) Placental mammals. D) Marsupials.
A) Nares. B) Vagina. C) Cloaca. D) Urethra.
A) Migrating long distances. B) Building nests in trees. C) Parental care of young. D) Laying eggs in water. |