Which of the following organisms has existed on earth for the longest time? Stro

Question

Which of the following organisms has existed on earth for the longest time? Stromatolite-producing prokaryotes An oak tree Cyanobacteria A Protist Sperm or eggs in humans always ______ Are genetically identical to all other sperm or eggs produced by that person Each have one copy of every gene Each contain all of the genetic information from their mother or father Each have two copies of every gene Hypotheses about the abiotic origin of life are still being tested and are somewhat speculative, which therefore means that the theory of evolution by natural selection is equally speculative. True False

Explanation / Answer

1. Answer: Cyanobacteria. Cyanobacteria were the prokaryotes which also formed stromatolites. Stromatolite forming prokaryotes are dated to be 3 billion years old, while cyanobacteria are dated to be almost 3.5 billion years old.

2. Answer: Each have one copy of every gene (as they are haploid)

3. Answer: False. The two theories are not related.

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