Last one:

Which action demonstrates a chemical change?

A. ice melting into water

B. wood becoming charred and black from burning

C. water evaporating from a sugar solution, leaving behind sugar crystals

D. a balloon suddenly popping

What effect does a large body of water (like a great lake or ocean) have on the weather in a city near it?

Which of the following must happen before the cell can go through mitosis? A. The cytoplasm must divide. B. The cell must copy its DNA. C. The spindle fibers must break down. D. The sister chromatids must separate.

What is a biomarker? the color coding of different genes a protein that is uniquely produced in a diseased state a molecule in the genome or proteome a marker that is genetically inherited

Why do biologists believe glycolysis evolved before the krebs cycle and the electron transport chain?

Dehydration synthesis and hydrolysis are reverse reactions. describe why they are reverse reactions

What is the role of the helicase enzyme in the DNA replication?

How does Keplers third law compare the periods and orbital radii of two planets with a solar system? -the square of the ratio of the periods equals the cube of the ratio of the radii -the square of the ratio of the periods equals the ration of the

What are two harmful effects on aquatic systems resulting from the increase in the human population in coastal areas?

if a slide is being viewed with the high power objective which adjustment knob should be used to sharpen the focus

The process of duplication from pre-existing genes is called