16. How many electrons from Carbon are involved in the covalent bonds in CCl4? a) one b) two c) four d) six e) eight 17. Which of the following is the process by which changes occur in the characteristics of species over time: a) fossilization b) oxidative metabolism c) evolution d) homeostasis e) both a & b 18. In deuterostomes, all the following are true about the development of the Neurocytes (nerve cells) EXCEPT: a) they develop from the mesoderm cells b) they develop from the ectoderm c) they form the Neural tube and eventually the CNS d) they are related to the neuro-muscular cells in the Cnidaria 22. Biological polymers were first synthesized by the process of dehydration synthesis during: a) metabolism of bacteria b) oxidation c) chemical evolution d) respiration e) both a and d 24. In mammals, for an enzyme to function, which of the following is necessary? a) a specific primary structure b) a specific DNA code c) a specific Tertiary Structure d) homeostasis e) all are correct
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