I NEED TO TURN THIS IN 10 MIN. : How do you think the amount of atmospheric CO2 has changed in the last 550 million years and how has this affected earth's climate explain your answer.

b tumor cells have a cell wall instead of a membrane

explanation:

tumor cells different from normal cells because tumor cells have a cell wall instead of a membrane.

the elements of art are the visual tools that the artist uses to create a composition. these are line, shape, color, value, form, texture, and space.

the principles of art and design are balance, contrast, emphasis, movement, pattern, rhythm, and unity/variety.

you should wear a lead protective shield when having teeth x-rays

hope i

-lavira : )