Which type of stem cells are most limited in differentiation

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

Coquina, a type of limestone, forms from shell fragments that settle on the ocean floor. what type of rock is coquina?

Competition occurs between species when