What are the sources of variation in a population? multiple choices unless it's all, idk

We can use solar powered cars or ride bikes instead of cars that burn fossil fuels

What is the difference between cytokinesis in plant and animal cells? animal cells dived by a cleavage furrow. plant cells divide by a cell plate that eventually becomes the cell wall. cytoplasm and cell membranes are necessary for cytokinesis in both plant and animals.

Regular or uniform type

The answer would be d. pili