Which of these phrases apply to prokaryotes?

originated ~3.8 billion years ago
originated ~1.6 billion years ago
have plasmids
have circular chromosomes
have chloroplasts
have mitochondria
have DNA inside a nucleus

Question

Which of these phrases apply to prokaryotes?

originated ~3.8 billion years ago
originated ~1.6 billion years ago
have plasmids
have circular chromosomes
have chloroplasts
have mitochondria
have DNA inside a nucleus

BlackTom AI · Accepted Answer

To evaluate this question, let's examine each statement about prokaryotes and determine whether it is true or false.
Option 1: 'originated ~3.8 billion years ago' — This is true. Current understanding places the emergence of prokaryotes very early in life on Earth, around 3.8 billion years ago, making them among the earliest life forms.
Option 2: 'originated ~1.6 billion years ago' — This is false. 1.6 billion years ago is far later than the origin of prokaryotes and would not align with the widely accepted timeline for their appearance.
Option 3: 'have plasmids' — This is true. Many prokaryotes carry plasmids, which are small circular DNA molecules independent of the main chromosome and can carry advantageous genes.
Option 4: 'have circular chromosomes' — This is true. Prokaryotic genomes are typically a single circular chromosome, although some have additional small circular elements (plasmids).
Option 5: 'have chloroplasts' — This is false. Chloroplasts are organelles found in plant and algal cells (eukaryotes) and are not present in prokaryotes.
Option 6: 'have mitochondria' — This is false. Mitochondria are organelles of eukaryotic cells; prokaryotes lack membrane-bound organelles like mitochondria.
Option 7: 'have DNA inside a nucleus' — This is false. Prokaryotes lack a defined nucleus; their DNA resides in the cytoplasm in a nucleoid region.
Overall, the true statements are options 1, 3, and 4, while options 2, 5, 6, and 7 are incorrect due to established differences between prokaryotic and eukaryotic cell organization and evolutionary history.

BIOL 1001 (090-095) Unit 3.1 Learning Quiz: Diversity of Life

Which of these phrases apply to prokaryotes? originated ~3.8 billion years ago originated ~1.6 billion years ago have plasmids have circular chromosomes have chloroplasts have mitochondria have DNA inside a nucleus

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