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1)True
2)A
3)A
4)C
5)A
Good Luck!
Answer:
Mary Mallon (September 23, 1869 – November 11, 1938), also known as Typhoid Mary, was an Irish-born cook believed to have infected 53 people with typhoid fever, three of whom died, and the first person in the United States identified as an asymptomatic carrier of the disease pathogen, Salmonella typhi.
1 - introduced to a habitat similar to their own
3 - outcompete native species
4 - generally have no native predators
6 - often have high reproductive rates
8 - can tolerate a range of conditions
Because you cannot test it or observe it.
A scientific theory are created through the scientific method, in the scientific method you need to be able observe it and experiment.
All organisms do have a closed circulatory system
so A <span />
