The reason the lactase gene is made is due to ?

Why are adults bigger than they were as children biology

Some birds look for food near cattle and other livestock. the movement of the cattle churns up the ground, making insects available to the birds. the cattle appear to be unaffected by the presence of the birds. what kind of relationship exists between the birds and the cattle? o a. parasitism o b. commensalism o c. predation o d. mutualism

Someone me with this: a mineral' is determined by its actomic structure.