The incas developed a record-keeping system using shells and beads on strings. knots and designs in strings. writing and pictographs. numbers and calculations

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

Guard cells control which event? the growth of plants capture of solar energy gas exchange in leaves water absorption in roots

Ascientist is conducting an investigation that involves water, silver, carbon dioxide, and oxygen gas which group of statements best describes all of the materials he is using in the investigation?