The human reproductive and endocrine system creates sperm and egg through meiosis. the joining of these gametes represents what type of reproduction

Ture or false evidence for evolution includes millions of fossils

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

Which of the following statements best distinguishes a hypothesis from a theory? a. theories are hypotheses that have been proved. b.hypotheses are guesses; theories are correct answers c. hypotheses usually are relatively narrow in scope; theories have broad explanatory power. d. theories are proved to be true; hypotheses are often contradicted by experimental results.