Vertebrates have back bones or spines that give there body support.
I think the respiratory system and circulatory system
Answer:
B. Asexual reproduction involves one parent, and sexual reproduction involves two.
Answer: It is verified by testing it. If the data supports the hypothesis, then we consider the hypothesis to be verified and true. If however, the data does not support the hypothesis or refutes it, then the hypothesis is in trouble, and we have to come up with a different hypothesis to explain the observations.
Explanation:
