Which type of force requires contact between two objects for one to push or pull the other

Which activity enables human to produce new genetic combinations on other organisms

Hydrofluoric acid (HF) can be dissolved in pure water. Will the pH of the solution be greater or less than 7? Explain.

The fertilized egg is totipotent, which means: it forms the membranes that surround and support the developing embryo. it can give rise to a complete organism. it can be removed and donated to a surrogate womb.

Explain why a person who has ab blood is considered the universal recipient. why can this person receive any other blood type?

Aquatic ecosystems are classified by all of the following except?

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?