Answer:
The urinary system and Integumentary system
Explanation:
The urinary system is the primary waste elimination system in the body. However, the Integumentary system also eliminates some waste products.
c natural variation in the bacteria means that some die while other are more resident and survive
It can be seen on a cladogram that modern birds and reptiles share a common ancestor. The piece of evidence that best supports this idea is <span>Feathers are a derived characteristic that first evolved in reptiles.
Both today's birds and ancient reptiles had feathers.</span>
