Cell division is regulated by two major genes. stimulate cell division and inhibits cell division. A. oncogenes, tumor suppressor genes B. tumor suppressor genes, proto-oncogenes C. proto-oncogenes, oncogenes D. proto-oncogenes, tumor suppressor genes

these muscles maintain the blood pressure in the vessels. the smooth muscles are innervated by nerves of the autonomic nervous system. when the muscles contract, they cause vasoconstriction of the vessels and increase blood pressure. when the muscles relax, they enable vasodilation of the   blood vessels hence reduce blood pressure.  

anthropod traits:

a well-developed collarbone

rotating shoulder joints

partially rotating elbow joints

opposable thumb

similar dental formula

answerdendrites; blank(2) axons;