In your own words, what is the definition for Vitamin (include why they are important to enzymes and what this relationship is called) can someone please help me with this?

Which scientific design has both practical limitations and limitations due to scale? studying the effect of bleach on the growth of mold spores exposing cultures of duckweed to different intensities of light observing the replication of dna molecules with a hand lens using colored marbles to model a cross between two colors of rabbits