earths second atmosphere (atmosphere II) was a thick atmosphere of primarily water vapor and carbon dioxide. What effects did this have on the earth

What is the plant system is most like the cardiovascular system in animals

This is the speed at which molecules or atoms move dependent on temperature and state of matter--?

Tp-37 who should you call first if you have an oil or fuel spil?

What is the major difference in the production of transgenic bacteria, plants, and animals?

A 10 month old child has been diagnosed with gastroenteritis. he attends day care what is the most likely cause of the illness

What could a dog living now and a car living thousnads if years ago have in common

The process of transducing air pressure waves into neural messages that the brain interprets as meaningful sound is known as

Why does photosynthesis require water? a. because water provides oxygen atoms. b. because water provides electrons. c. because water accepts electrons. d. because water acts as a catalyst.

An education guess or rational explanation about a specific phenomenon

What are the technical name for red blood cells white blood cells and platelets?