You started out as a single cell and are now made of over 200,000 different types of cells. explain how this happens.

What is special about nitrogen, and what is its main function in the atmoshpere?

Name two functions of cytoskeleton

812 km in terrameters

A biologist hypothesizes that a squirrels body size is affected by the inclusion of a particular type of food in its diet. Which is the best method the scientist could use to prove this hypothesis?

Which achievement would most likely be accomplished by a biologist?

The theory that explains how the earths surface is made up of moving rocky plates is called: A. Supercontinent B. Plate tectonics C. Sea floor spreading D. Continental drift

10. Which of the following is an emerging dis- ease that was unknown 50 years ago? a. malaria b. dengue fever C. Lyme disease d. schistosomiasis

What are the agents for deposition

Witch two factors can both cause a population to increase Birth rate and emigration Birth rate and immigration

The gas waste generated by many power plants is a. carbon dioxide. c. nitrogen. b. hydrogen. d. sulfur oxide.