At what angle is Earth. s axis tilted in to the sun?

23.5

32.5

33.2

53.2

How does the rough Endoplasmic Reticulum differ from the smooth ER in structure and function?

Unicellular and multicellular organisms both perform which processes?

Which transport process requires the use of a cell's energy?

Magnetic storms are the result of which of the following A. Constant solar wind B. An increase in the number of solar wind parties C. A solar prominence D. 10 to 11 year cycling of sunspots

What term describes inorganic molecules that perform vital functions in the body?

Why must experiments be repeated many times

Why is a nucleus found in both plant and animal cells?

Explain three disadvantages to using an electron microscope to view microorganisms.

What are the two strands of dna held together by?

Using context clues, what does predecessors mean as it is used in the first paragraph