You have about 500 different species of bacteria in your mouth. Some of these are strict anaerobes, meaning they die when they're exposed to oxygen. How can anaerobes survive in your mouth when there is so much oxygen there

You and a group of friends are spending your vacation hiking through the mountains. it is cold in the mountains. you will be expending a lot of energy while hiking and you will need plenty of energy to keep you warm. you should pack foods high in to provide the most energy or kilocalories per gram of food. a) carbohydrates b) lipids (fats) c) proteins d) sugars

What happens when a scientific theory is shown to be an accurate description of a phenomenon?

Which of the following molecules could pass through the plasma membrane by simple diffusion? a. na+ ions b. glucose c. amino acids d. carbon dioxide