What occurs during the process of meiosis in humans that can lead to a child with the condition of down syndrome?

Where is energy trapped inside the organelle chlorophyll

Why reason best illustrates why hershey and chase chose to use viruses in their experiment?

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