Q: Name the type of system that a jellyfish does not have?


Read this paragraph and choose the correct option from the provided answers:

The half-life of titanium-44 is 60.0 y. A sample of titanium contains 0.600 g of titanium-44. How much remains after 100.0 y?.

 Choices:

- nervous

- reproductive

- hereditary

- circulatory


A:
circulatory