Answer the following question given this paragraph: Mammals are a class of endothermic vertebrates. They have four limbs and produce amniotic eggs. The mammal class is defined by the presence of mammary glands and hair (or fur). Other traits of mammals include sweat glands in their skin, alveoli in their lungs, a four-chambered heart, and a brain covering called the neocortex. Q: What class of animals have four limbs and produce amniotic eggs? Choices: - reptiles - insects - amphibians - mammals A:
mammals

Answer the following question given this paragraph: Q: What substances are secreted by specialized cells usually located in endocrine glands? Choices: - lipids - protein - acid - hormones A:
hormones

Answer the following question given this paragraph: Renewable resources can be renewed as they are used. An example is timber , which comes from trees. New trees can be planted to replace those that are cut down. Sunlight is a renewable resource. It seems we will never run out of that! What are some other renewable resources?. Q: What are resources that don't run out? Choices: - residual resources - general resources - orbital resources - renewable resources A:
renewable resources