Parasitic strains of E. coli may produce poison- ous chemicals that attack living tissue and cause
disease in humans. These chemicals are called
(1) antibodies
(2) toxins
(3) viruses
(4) antibiotics

Which best describes what you will do in the reaching your academic potential course?

Which of the following is a testable hypotheses?

The embryos of a bird, a reptile, and a mammal are similar in appearance. how does comparing the physical appearance of embryos of different species support the theory of evolution? a. it shows that these organisms share a common ancestor. b. it provides evidence that these organisms eat the same foods.c. it shows that these organisms share the same habitat.d. it provides evidence that these organisms suffered a genetic mutation.