Answer:
I'd say nuclear, because of the dangers associated with producing it.
Explanation:
1983-1984 was when it was discovered
Answer:
closed circulatory system
Explanation:
The blood is pumped through a closed system of arteries, veins, and capillaries. ... Still, blood can flow backward and the system is only slightly more efficient than the open system of insects. The closed circulatory system has more advantages over the open circulatory system.
Answer: some members are shaped like rods and termed bacilli
