How does biodiversity affect the stability of an ecosystem?

How does the nervous system affect the excretory system?

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

What is the role of dna ligase in the elongation of the lagging strand during dna replication?