Bio- Origins of Life Quiz

Which of the following best describes current scientific thinking about the origins of life on Earth?

• It has been proven that life came to Earth on comets.

• Scientific explanations have changed based on new information.

• Fossil evidence of the earliest form of life is common and well accepted.

• The creation of organic molecules in ancient "soup" is the only possible explanation for the origin of life on Earth.

What theory suggests that life comes from non-living matter? 

• Cell Theory 
• Spontaneous Generation
• Miasma Theory
• Endosymbiotic Theory 

The smallest unit which can be considered life is called __________. 

•  a prokaryote
• a LUCA
• a cell
• a phospholipid

The earliest fossils indicate that microbial mats used to depend on hydrothermal vents for energy and chemicals for food, but later fossils show that they developed photosynthesis.

What can be inferred from this information?

• The earliest life forms were multicellular.

• The early Earth had an atmosphere without oxygen.

• The early Earth was too hot for living organisms to survive.

• The earliest life forms used to contain chlorophyll in their cells.

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What is endosymbiosis?

• one cell's liife ends to support the growth of another

• a process wherein cells destroy each other

• cell division

• a prokaryote inside a eukaryote

Chloroplast and mitochondria have their own DNA. This is evidence that supports which theory?

• Endosymbiotic Theory

• Endergonomic Theory

• Exiobiological Theory

• Exosymbiotic Theory

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What is the MINIMUM amount of cells an organism must have to be considered living

• 1

• 2

• 3

• 4

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Which type(s) of cells contain DNA

• plant cells
• animal cells
• bacteria cells
• all cells

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DNA is located in the _____ in eukaryotic cells.

• nucleus

• cytoplasm

• mitochondria

• ribosome

Which of these events does not need to occur in order for life to first evolve?

• photosynthesis begins to provide O₂

• genetic material must self assemble 

• organic molecules must self assemble

• cells must spontaneously generate