Please help with all 4 questions

Match with o for organic and i for inorganic for each compound

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

How would the function of synovial joints be changed if they lacked joint cavities and the bones were united instead?