Before Schwarzschild, scientist had little understanding of the relativity of gravitational force. True

False

one characteristic that is shared by all is a soft body. many

of these invertebrate animals also have an outer shell to protect their

body. oysters, clams, snails, and mussels are all mollusks. so are octopuses, squids, and slugs. mollusks live on land and in freshwater.

1. is geographic distribution

2 is increasing complexity

3 is transitional forms