What is a probable source of earth's magnetic field a. earths iron core
b. the sun
c. the moon
d. earths tides

Describe the function of the endomembrane system? what organelles are involved?

Identify two examples of chemical reactions that you have encountered during the last week. identify an exothermic and endothermic reaction. explain.

What part of the cell does 9 represent? a. cytoplasm b. lysosome c. ribosome d. centrosome