Which procedure should not be used during the heating of substances in a test tube? A) Point the test tube away from you.
B) Stopper the test tube to prevent spills.
C) Wear safety goggles.
D) Use a test tube holder to avoid burns.

What does the hardy-weinberg principle relate to? a. chances of survival of an organism b. frequency of alleles in a population c. natural selection in a species d. causes of evolution among organisms

Which of the following describes a difference when gram-positive bacteria are compared to gram-negative bacteria?

When new rock is added to an oceanic ridge, the magnetized strips on either side of the ridge are evidence of sea-floor spreading. this is because the rocks on the two sides of the ridge o are equal in width and in polarity are polar opposites oare magnetized vary in width but are equal in polarity