Fill in the blanks: The three main components of a cell are the______ , the______, and the______.

In what ways do the internal membranes of a eukaryotic cell contribute to the functioning of the cell?

Is this statement true or false? 'Animal cells have mitochondria; plant cells have chloroplasts.' Explain your answer, and describe the functions of these organelles.

Describe the structure of the plasma membrane of an animal cell. What would be found directly inside and outside the membrane?

Imagine a spherical cell with a radius of 10 μm. What is the cell's surface area in μm2? Its volume, in μm3? (Note: For a sphere of radius r, surface area = 4πr2 and volume = 4/3πr3. Remember that the value of π is 3.14.) What is the ratio of surface area to volume for this cell? Now do the same calculations for a second cell, this one with a radius of 20 μm. Compare the surface-to-volume ratios of the two cells. How is this comparison significant to the functioning of cells?