The Living World 8th Edition by George Johnson

تمرين 6

While there are more described species of insects than all other animals put together, only a very few insects live in marine environments, and most of them on the ocean surface or shoreline. What factors do you think might be responsible for the insects's lack of evolutionary success within oceans?
What segment of the grasshopper, a typical insect, contains the legs? What segment of the lobster, a typical crustacean, contains the legs?