Directions: Select each correct answer.

Read the passage, then answer the question below.
What could the scientists do to increase the reliability of their data?

A. increase their sample size
B. use an experimental control
C. repeat their experiment

Which class of molecules contains the amino group, nh2 (a) sugars (b) water (c) proteins (d) hydrocarbons

Why is the theory of evolution important? it disproves all other theories about how life began. it provides a topic for debate. it is a unifying concept in biology. it explains how life began. i know for sure, it is not "it is a unifying concept in biology."

What material did the moon come from?