Neurospora requires three different enzymes to complete this biochemical pathway because each enzyme – * Captionless Image
is made of amino acids
is specific to a single substrate
creates the same compound
can only be used a single time

thats not a question

all these collisions do one thing, and that thing is explained in the last option. when dusst, rocks and ice collide, they harden and form giant layers of rocks or hard ice.

d)   to harden materials to form different parts of earth’s layers

hope it ,

bioteacher101