1. What characteristics are found only on vertebrates?
A. Have a well developed nervous system and skeleton Chave soft and spongy bodies
B. have no internal skeleton and cell wall
D. small and slow moving
2. What is the common characteristic among invertebrates? They have
A well developed internal skeleton
C. no backbone
B. segmented bodies
D. backbone
3. Why do whales belong to the group of mammals? They have
A moist skin for breathing.
C. lungs and mammary glands
B. scaly bodies for crawling
D. gills and fins for swimming
4. What group of vertebrates is warm-blooded, covered with feathers and have strong and lightweight
bones?
A reptile
B. fish
C. bird
D. amphibian​