What type of transport takes place when a proton allows an ion to enter a cell but no additional energy is needed to make this happen

What did marie and pierre curie discover about radioactivity

Metabolism is the sum of all of the chemical reactions carried out in an organism. A. What molecule temporarily stores energy that cells can use to carry out the reactions of metabolism? B. How do cell generate this molecule that stores energy?

Which is an example of science playing a role in developing technology? A. the use of an electric spark to produce amino acids from gases that are present in Earth's early atmosphere B.

During which of the following phases of the cell cycle Is DNA Replicated

Which of the following are narrow blood vessels that restrict blood flow and have thin walls that allow gas exchange? Alveoli Veins Arteries Capillarie

What is a controlled experiment? A. An experiment that uses carefully controlled conditions B. An experiment that is performed inside C. An experiment that has no manipulated variable D. An experiment that is controlled by a company

Which is more numerous, the amount of microbes or the amount of people

Which type of cell is created during meiosis? A) skin B) liver C) blood D) sperm

What is the purpose of a reserve?

In which organelle are the lipid components of the cell membrane assembled