What is the main difference between a cell nucleus and a nucleoid?
a. size of the organelle.
b. arrangement of the cytoskeleton
c. movement of the flagella
d. presence or absence of a surrounding membrane

Which of these statements is true about autotrophs, but not heterotrophs? a. they use sugar and oxygen to make carbon dioxide and water.b. they use chlorophyll and oxygen to make carbon dioxide and water.c. they use sunlight, water, and carbon dioxide to make sugars.d. they use sunlight, water, and oxygen to make chlorophyll.