I think the only answer choice here that really makes sense is D
One long, single molecule of double stranded, helical, supercoiled DNA. In most bacteria, the two ends of the double-stranded DNA covalently bond together to form both a physical and genetic circle
Answer:378
Explanation: 378
have been cloned and
The other 207 loci have been mapped out, the true gene identities have yet to be determined.
Answer:
The Circulatory System
Explanation:
When blood is rich in carbon dioxide it leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs. (All of which have to do with the circulatory system)