Identify the items below that can cause illness

In this experiment, the was intentionally manipulated. it is the independent variable. the dependent variables that were measured were the

Which of the organisms listed below performs nitrogen fixation? a. legumes b. plants c. bacteria d. fungi

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.