Complex Animals Review

The video explores the fascinating features of complex animals, starting with fishes, which have gills and are ectotherms. It then covers amphibians, which live in water early in life and on land as adults, and reptiles, which live entirely on land with scales to prevent drying out. Birds and mammals, both endotherms, are discussed next, highlighting birds' ability to fly and mammals' advanced traits like fur and live births. The video concludes by encouraging viewers to reflect on these characteristics when observing animals.

What is a unique feature of fishes that helps them breathe underwater?

• Scales

• Gills

• Fins

• Lungs

How do amphibians differ from fishes in terms of their life cycle?

• Amphibians live only in water

• Amphibians start life in water and move to land as adults

• Amphibians have scales

• Amphibians are warm-blooded

What adaptation allows reptiles to live entirely on land?

• Fur

• Thick skin and scales

• Feathers

• Gills

Which feature is common to most birds?

• Gills

• Live birth

• Thick skin

• Ability to fly

What is a distinguishing characteristic of mammals?

• They are ectotherms

• They have fur or hair and give birth to live young

• They lay eggs

• They have feathers