Question

Questions 10, 7, 8, 3

1 Normal No Spac Heading 1 Heading 2 Paragraph QUESTION 10 Arrange in order of appearance, from earliest to most recent prokaryotes eukaryotes QUESTION 7 Adaptive radiations are ofen seen after which of the following? sexual selection takes place major new evoluionary adaptations, such as tight occur ● sympatc speciation events mass extinctions QUESTION 8 In a hybrid zone, which of the folowing would tend to lead to reinforcemen senual selection hybrid breakdown reduced hybrid tedy reduced hybrid viability weakening of reproductive barriers QUESTION 3 An is a structure that had one function originaly, and later evolved other functions

Answer 1

1) The fossil record for the first appearance of cyanobacteria, a prokaryote is dated to have appeared 3.5 billion years ago. Archaea and other prokaryotes may have been present, but fossil records are only found for cyanobacteria. Following is the order of appearance of the living organisms on earth:

1. Cyanobacteria
2. Prokaryotes
3. Eukaryotes
4. Multicellular organisms