# 2Trắc nghiệmWhich characteristic is unique to mammals?Laying eggsBreathing with gillsHaving hair or furHaving scales
# 3Trắc nghiệmWhat is the main function of fish gills?To filter foodTo breathe underwaterTo protect from predatorsTo help with balance
# 4Trắc nghiệmWhich animal is known for its ability to change color for camouflage?ChameleonElephantKangarooPanda
# 5Trắc nghiệmWhich characteristic is typical of amphibians?Having scalesLiving in both water and landFlyingHaving feathers
# 6Trắc nghiệmWhat feature is most associated with mammals?Laying eggsGiving birth to live youngHaving gillsHaving feathers
# 7Trắc nghiệmWhich characteristic is common to all birds?Having scalesHaving feathersHaving finsLiving underwater
# 9Trắc nghiệmWhich characteristic is typical of primates?Having feathersWalking on four legsOpposable thumbsLaying eggs
# 10Trắc nghiệmWhat is a unique feature of birds of prey?Having sharp beaksSwimmingHaving furLaying eggs
# 11Trắc nghiệmWhat characteristic is shared by all mammals?Having scalesProducing milkHaving feathersLaying eggs
# 12Trắc nghiệmWhat is a notable characteristic of reptiles like snakes?Having furShedding their skinFlyingLiving in water