Agood scientific theory:
a. is arrived at by chance.
c. is not provable.
b. is the foundation of the scientific method.
d. accurately predicts the results of future experiments.

Explain how the number of similarities between the embryos from early stage to late stage is used as evidence of a common ancestry

Which statement describes characteristics of planarians? a they live in oceans, are parasites, and reproduce only sexually. b they live in fresh water, are parasites, and reproduce only asexually. c they live in oceans, are free living, and reproduce sexually and asexually. d they live in fresh water, are free living, and reproduce sexually and asexually.

This is the interaction of two organisms where one is and the other is neither nor harmed.