What 2 methods did scientist use to arrive at the order in which these organisms appeared first, protists, bacteria, land plants, amphibians, and mammals

Which is a part of the cell theory? a) cells come from pre-existing cells b) cells have a nucleus c) organisms with one cell must be seen with a microscope d) organisms must have more than one cell to live

Diffusion, Osmosis and Enzymes The diffusion of water from a high concentration to a low concentration Lowers the amount of energy needed to perform chemical reactions When you breath O2 passes into your blood stream while CO2 passes out of your

Was your Andre Marie married? Did he have children?

Which of the following is most likely to improve the fitness of a population to its environment? a. genetic drift b. mutation c. natural selection d. gene flow e none of the above will improve fitness.

Your mother asks you to carry a load of wood to the fireplace and lower it to the hearth. In doing this you have used your legs as levers. Which statement describes this as a class three lever? Question 13 options: A.

Should animals be bred for dissection? State and support your opinion.

Which statement does NOT correctly describe our sun? A. Our sun is an average sized star B. Our sun is a very old star C. Our sun has an average brightness D. Our sun is yellow-white

One scientist discovered a new theory on the evolution of stars. Why is it necessary for scientists all over the world to agree with the theory before it can be accepted?

Which u. s. states are most likely to oppose strict permit requirements under the Clean Air Act

In a text area below compare and contrast a cell membrane and a cell wall