Are the bones of the limbs arranged in a smilie or in a very different way in each animal

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

If a robot fixed another robot is it a engineer or doctor?

Ais a landform that is formed at the mouth of a river from the deposition of sediment carried by the river as the water flows.