Birds have and not teeth.
a. jaws
b. molars
c. beaks

Which of the following statements is true of enzymes? a)they dont provide an active site for substrates to bind in a reaction b)they act on a specific type of substrate in a reaction c)they unusable after a reaction d)they change shape after a reaction

Use the drop down menus to match each example to the fossil topic discussed then to show how the fossil record gives evidence of evolution

Depending on the organism the number of in a cell may change