A eukaryotic cell always has this unique characteristic? cytoplasm
O membrane
nucleus
ribosomes

Amale bird-of-paradise uses a dance to attract mates in which it flaps its tail feathers on the ground and jumps around a potential female mate. a different male bird-of-paradise does a similar dance but it jumps around the female in the opposite direction. the female bird is only attracted to one style of dance, in one direction. this is an example of speciation.

What best explains the inability for life to exist in earth early atmosphere

Are humans interfering with or a part of evolution happening today? find examples of evolution seen in recent history that could be caused by human activity.