Question: Choose your answer.

Fossil records indicate that Earth was first inhabited by bacteria-like organisms. These organisms
My Answer: were single-celled.

Question: Choose your answer.

Which best describes a proton?
My Answer: positively charged and part of the nucleus

Question: Choose your answer.

Until recently the Grand Canyon was thought to be about 5-6 million years old. Recently a scientist gathered data and wrote a paper for a scientific journal that indicated the canyon is about 17 million years old. Before this new information about the canyon is accepted, which of these needs to occur?
My Answer: Many scientists need to evaluate the data.

Question: Choose your answer.

An organism's traits are largely determined by the genetic makeup of its parents. A mutation in which kinds of cells in a parent could cause a new trait to appear in the parent's offspring?
My Answer:
sperm or egg