Key changes that occurred during hominid evolution

The organelle pictured is found in cells of and is theorized to have once been an independent organism.

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

Moving down the ramp from 6 meters to