When did prokaryotes arise

Which of the following combinations has more free energy: glutamic acid, ammonia, ATP, or gluta - mine, ADP, i

Professor Hydro is trying to set up a salt water aquarium for his classroom. He is a chemist who has researched water quality and has the tank perfect for simulating a marine ecosystem off New England.

Diffusion of water across a membrane from areas of higher concentration to areas of low concentration is called

Alice and Julio's company makes protective coverings for off-roading vehicles. Alice's job involves harvesting a natural polymer from trees. Julio's job is to take that material and change it chemically to create a synthetic polymer.

A cell is in a solution of 40% water. if this cell swells, what can you state about the relationship of the cell to its solution?

The part of the cell cycle when a cell is carrying on my prices and not dividing is called

What phase of the cell cycle are brain cells in

How do Multiple alleles and polygenic traits differ?

What are the negative consequences of improper disposal of electronic waste?

Poliomyelitis is caused by a virus that spreads easily in human populations. most people with polio infections show no symptoms of disease.