Jonas states four interesting facts about bones. Which of Jonas’s statements is incorrect? Some bones have holes through them.
Bones are made mostly of sugars.
Bones are made of layers.
Bones can have different shapes.

Which of the following is not a food produced in rainforests? a) coffee b) cocoa c) avocados d) wheat

What evidence did mendel find that supported his law of independent assortment? a. some traits are controlled by several different genes. b. a trait can be passed on from a parent to an offspring. c. most traits have a dominant form and a recessive form. d. different traits are passed on independently of each other.

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.