Why is the difference in shape of plant and animal cells necessary for there function

Which sequence correctly shows the path of carbon dioxide during repiration?

What is the cause hearing loss in human being

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