The mammalsVersión en línea Pregunta de selección múltiple por Nuria Fernández Martínez 1 Mammals have... a fur or hair b fur or scales c scales and feathers 2 Mammals are... a cold-blooded b warm-blooded c hot-blooded 3 Mammals have... a don´t have a backbone b have spines c have a backbone 4 A dog is a... a reptile b mammal c invertebrate 5 Most mammals live... a on land b in the water c in the air 6 The largest mammal on Earth is the.... a the rhino b the elephant c the blue whale 7 Mammals that eat other animals are called... a carnivores b hervivores c omnivore 8 Are humans mammals? a No b Yes 9 What are the only mammals that lay eggs? a Kangaroos b Plytapus c Hippos Feedback 1 Reptiles and fish have scales. Birds have feathers. 2 Their blood is naturally warm. 3 They have a skeleton. 4 They Have fur or hair, drink their mom's milk when they're babies, are warm-blooded and have a backbone 5 Most mammals live on land—on the ground, in trees, or even underground. 6 t may be more than 100 feet (30 meters) long and may weigh 200 tons (180,000 kilograms). 7 Cats, dogs, weasels, walrus, and many other mammals are carnivores. 8 Today many mammals compete with humans for food or space. 9 The platypus and echidnas are the only mammals that lay eggs. After the young hatch, they drink milk from their mother, just as other mammals do.