which step in a scientific investigation would a scientist usually do before she performs an experiment?

1. About how long ago did the solar system form (as nothing more than a cloud of gas and dust) ?

Health-care workers are exposed to many different types of pathogenic and nonpathogenic microorganisms.

Why Is It important to ensure a scientific claim is accurate?

Which type of cell division results in a daughter cell with 1/2 of the genetic information as the parent cell?

Which domain includes plantae, fungi, animalia and protista?

Living animal cells, each with a salt concentration of 1%, are placed in a solution of 30% salt. Which of the following will occur? A.

The duck-billed platypus has 52 chromosomes in its body cells. When the platypus's body cells divide by mitosis, how many chromosomes will each daughter cell have?

What is a prokaryotes in biolog

Which of the following does not represent conditions believed by scientists to have been present on early Earth? A. An atmosphere thick with water vapor B. energy in the form of ultraviolet radiation C. extremely cold temperatures D.

What would happen if a cell stopped functioning correctly?