On average, adolescents need how many hours of sleep each night for proper growth and brain development?

A. 12

B. 9

C. 5

D. 7

What's the hormone linked with happiness?

On average, how much of the suns energy that reaches earths outer atmosphere is reflected back into space?

What is meant by suggesting that Earth's oceans are connected? A. All ocean water came from a single comet that broke into five large pieces. B. All of the crustal plates underlying the ocean share a border with each other. C.

What are auroras made of?

Who first called animal-like protists "animalcules" after examining a drop of pond water under a microscope? A. Anton von Leeuwenhoek B. Michael Faraday C. Robert Hooke D. Gregor Mendel

What are two disadvantages of cephalization?

What would happen if all the energy in glucose were released in just one step instead of gradually as it is in cellular respiration? How is the gradual process of cellular respiration advantageous to the cell?

Describe how the structure of DNA determines the structure of proteins.

What are the multi-branching extensions on the periphery of a neuron primarily responsible for receiving information?

Why do many fishermen support efforts to protect and restore mangrove forests?