When a genetic mutation occurs, which part of the DNA changes? -nitrogen base
-deoxyribose sugar
-phosphate
-the back done

Which term describes the number of waves that pass a given point in a given time? crest frequency trough wavelength

Autotrophs a.consume their food to get energy b.may use photosynthesis to gain energy c.are also called consumers d.cannot use solar energy

The finches on the galapagos island were similar in form except for variations of their beaks. darwin observed that these variations were useful for: attracting a mate defending territory building nests gathering food