Invertebrates are sometimes referred to as "lower" animals. this is because they evolved earlier and are simpler than vertebrates. do you think invertebrates are also less adapted to their environments that vertebrates? why or why not?

How do chloroplasts set plants apart from other living things

Penelope studies how the structure and function of the nervous system is related to behavior. she is a psychologist

Why is earth's outer core hotter than earth’s oceanic crust? earth’s oceanic crust is denser than earth’s outer core is. earth’s oceanic crust has lava flowing from the mantle. earth’s outer core has a composition of solid iron and nickel. earth’s outer core is deeper within earth than oceanic crust is.