Consider the evolution of chordates, organisms with a hollow nerve chord. choose the organism most closely related to humans.
a)
lamprey
b)
sea star
c)
lancelets
d)
brittle star

b. heterotroph

explanation:

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.

here is the answer

water, ice, acids, salts, plants, animals, and changes in temperature are all agents of weathering. weathering is the breaking down or dissolving of rocks and minerals on earths surface. once a rock has been broken down, a process called erosion transports the bits of rock and minerals away.

want or the answer