How do all multicellular organisms begin?

a.
as complex organisms

b.
as a single cell

c.
by expanding the size of their cells

d.
by creating all their cells at one time

As a small change in a person's dna can cause a genetic disorder

What did not occur in the proterozoic eon a)the oxygen levels increase greatly in the atmosphere, b)the emergence of the eukarya , c)muti cella’s eukaryotic organisms began to diversify, d)anaerobic bacteria kept thriving with more oxygen

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