Nitric acid is used to make the fertiliser ammonium nitrate, NH, NOZ. What advantage has this fertiliser over another common fertiliser, ammonium sulfate,
(NH.),SO.?

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.

The two main stages of cell division are called

The most effective way to provide children with safety messages is to