Certain gases in air are important natural resources that are used in welding. two of these gases are a.) oxygen and argon b.) hydrogen and flourine c.) chlorine and sulfur dioxide d.) nitrogen and carbon dioxide

What is the surface temperature of the ocean where hurricanes form? greater than 80 celsius approximately 27 celsius at least 76 celsius less than 10.5 celsius

Aflame cell is at the end of each tubule of the nephridium malpighian tubules kidneys none of the above

Fossils of ancestors of the modern horses show a small 4-toed almost dog-like browsing animal named eohippus over time the horses got larger lost toes and changed to a grazing diet what is the best explanation of why this change occurred