Answer:
1. A cloning vector is a small piece of DNA that can be stably maintained in an organism, and into which a foreign DNA fragment can be inserted for cloning purposes.
2. Cloning vectors are plasmids that are used primarily to propagate DNA. They replicate in E. coli to high copy numbers and contain a multiple cloning site
3a. Examples of cloning vectors are plasmids, cosmids, bacterial artificial chromosomes (BACs), and yeast artificial chromosomes (YACs).
3b. plasmids- small, BACs- large, YACs- large, cosmids- large
Explanation:
hope this helps