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