Galapogos tortoises have a number of shell variations, shown right. What are the advantages
of choosing a system examining the beaks of
finches instead of the shells of tortoises? Check
all that apply.

What is the difference between the conducting zone and the respiratory zone of the respiratory system? the conducting zone is a series of cavities and tubes that move air to the respiratory zone where gases exchange with the bloodstream. the conducting zone exchanges gases between the lungs and the alveoli and the respiratory zone is a series of cavities and tubes that move air to the conducting zone. the conducting zone moves oxygen into the cells and the respiratory zone takes carbon dioxide away from the cells. the conducting zone moves oxygen into the bloodstream and the respiratory zone takes carbon dioxide away from the bloodstream.

If a strand of dna has 35% thymine. what is the percentage of cytosine, adenine, guanine?

Natural resources are any materials that humans obtain from the earth to meet our wants and needs.