(Question)
If penguins are endothermic tetrapod vertebrates, then what are endothermic tetrapod vertebrates? Answer choices: - mammals - clouds - humans - penguins - jellyfish - warm-blooded - fur and fat - animals
(Answer)
penguins

(Question)
If the layer of body fat under the skin mammals is especially important in cold climates, then what aspect of mammals is especially important in cold climates? Answer choices: - layer of body fat under skin - lips - sweat glands - To conserve energy - toes - food and shelter - It helps them survive - by keeping them warm
(Answer)
layer of body fat under skin

(Question)
If sleep has a positive impact on health, then sleep has what impact on health? Answer choices: - negative - neutral - exercise - It expands - ambiguous - positive - sweating - movement
(Answer)
positive