Cell Evolution

Which type of cell appeared first on earth?

• Prokaryotic cells

• Eukaryotic cells

• Animal cells

• Plant cells

Which type of cell appeared first on Earth?

• Prokaryotic cells

• Eukaryotic cells

• Animal cells

• Plant cells

What is the primary difference between prokaryotic and eukaryotic cells?

• Presence of a nucleus

• Size of the cell

• Shape of the cell

• Color of the cell

Which organelle is believed to have originated from a symbiotic relationship between primitive eukaryotic cells and bacteria?

• Mitochondria

• Ribosome

• Golgi apparatus

• Endoplasmic reticulum

What is the endosymbiotic theory?

• Theory that explains the origin of eukaryotic cells from prokaryotic organisms

• Theory that describes the process of photosynthesis

• Theory that explains the Big Bang

• Theory that describes the evolution of mammals

Which of the following is a characteristic of prokaryotic cells?

• Lack of membrane-bound organelles

• Presence of a nucleus

• Large size

• Complex structure

What is the significance of the Miller-Urey experiment in understanding cell evolution?

• It demonstrated that organic molecules could be synthesized from inorganic precursors under early Earth conditions.

• It proved the existence of DNA.

• It showed how cells divide.

• It explained the process of photosynthesis.

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Which molecule is considered the first genetic material?

• RNA

• DNA

• Protein

• Carbohydrate

What role do ribozymes play in the theory of the RNA world?

• They act as catalysts and support the idea that RNA could have been the first self-replicating molecule.

• They are responsible for protein synthesis.

• They store genetic information.

• They provide structural support to cells.

Which process is believed to have led to the formation of the first cell membranes?

• Self-assembly of lipid molecules

• Photosynthesis

• Cell division

• Protein synthesis