Scientific laws explain how and why something occurs on a scientific level

A class is doing an experiment to test which solids will dissolve in water. They are testing salt, baking soda, cinnamon, and sugar. How will the students know if each solid dissolves? A. The solid will fall to the bottom of the container. B.

In a population that meets the assumptions of Hardy-Weinberg equilibrium, 81% of the individuals are homozygous for a recessive allele. What percentage of the individuals would be expected to be heterozygous for this gene in the next generation? A.

Earth's stratosphere is above Earth's protective atmosphere, having conditions that are dry and cold, have intense ultraviolet solar radiation, and vacuum-like air pressure.

Which of the following describes why cell transport is important? Cells can increase the concentration of certain molecules cells can decrease the concentration of certain molecules cells can maintain balance with their environment all of the above

Which statement about the composition of ocean water is true? A. the composition of ocean water varies within seasons B. the composition of ocean water varies with depth C. the composition of ocean water is the same within the entire ocean D.

How has the use of pcr improved modern dna forensic science?

Which of the following statements about the Earth's atmosphere is true? It contains 21% oxygen. It contains 78% water vapor. It contains 21% carbon dioxide. It blocks all radiation from the sun.

A cladogram is shown below. Based on the cladogram, which two species share the most recent common ancestor? A. owl and salmon B. lizard and owl C. salmon and rat D. rat and toad

The cell membrane controls movement of materials into and out of the cell. The following particles are moving from high concentration to low concentration and are using a carrier protein.

Where is the moving electric field that causes Earth's magnetic field? A.) earth surface B.) in space C.) earth mantel D.) earth core