Which of the following statements is true about the worm phyla? A. Annelida, Platyhelminthes, and Nematoda all have animals with a coelom
B. Annelida and Nematoda phyla are the simplest of all worms while Platyhelminthes are complex worms
C. many annelids are parasites, but flatworms and roundworms help fertilize the soil
D. most annelids are free-living animals, but most flatworms and roundworms are parasites

question: which statement best describes the different properties of metals?

answer: they are shiny and bend without breaking.

since metals have certain characteristics properties, they include the following: they are ductile, malleable, shiny, hard, lustrous, flexible and they are good conductor of heat and electricity. so therefore, metals are not dull and they are not non-flexible as listed. instead, they are shiny and flexible.

hope this , have a good day. c;

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