Every amino acid has four characteristic components. list the four parts of an amino acid

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above

If t=tall and t=short what will be the physical appearance of the offspring the cross below? a.some will be tall and some will be short b.they will all be tall c.they will all be short d.they will be medium height

These are the components of the reservoirs of carbon that are exchanged in our environment.