How much of earths atmosphere is made up of nitrogen and oxygen? A. Less than 1 percent B. close to 99 percent C. 50 percent D. Between 24 and 75 percent

Which of the following is true about process of the shape the earth. A. some processes that shape of the earth are happening so slowly they cannot be easily detected in a human life time

Literal definition for kids about biology

What effect does human activity have on many ecosystems?

The 3' to 5' exonuclease activity associated with replicative DNA polymerases is responsible for increasing the accuracy of DNA synthesis approximately a) 2 fold b) 10 fold c) 100 fold d) 1,000 e) 1,000,000 fold

The primary functions of cartilage are to reduce friction between articular surfaces, absorb shocks, and reduce stress on joint surfaces. where in the human body would you expect to find cartilage?

How many variables should you have in a control experiment?

How is science different from other subjects such as art or history

What happens if you don't have enough carbohydrates?

Describe the movement of "air" into and out of the respiratory system. Be sure to include the following structures (larynx, trachea, bronchi, bronchioles, and alveoli) while being specific about whether it is mainly oxygen or carbon dioxide moving

How are diffusion and osmosis different? A. Osmosis is the movement of proteins. Diffusion is the movement of water. B. Osmosis is the movement of water. Diffusion is the movement of chemicals and molecules. C.