Origin of Life

Which types of organisms developed first due to the early environmental conditions on Earth?

• prokaryotic and aerobic

• prokaryotic and anaerobic

• eukaryotic and aerobic

• eukaryotic and anaerobic

Cells without a nucleus are said to be _____________________.

• Eukaryotic
• Prokaryotic

Which type of cell came first?

• Eukaryotic
• Prokaryotic
• Plant
• Both Eukaryotic and Prokaryotic cells evolved around the same time

Which of the following is the natural law that states that living organisms come only from other living organisms?

• evolution

• oxidation

• biogenesis

• spontaneous generation

Spontaneous generation is

• a change in a species over time; process by which modern organisms have decended from ancient organisms

• A theory that life comes from non-living objects

• The species from whom a current one has decended

• A theory that life come from life

The early Earth's atmosphere was lacking:

• Carbon Dioxide

• Water

• Lightning

• Oxygen

What type of organisms created oxygen for early life on Earth?

• Heterotrophic Bacteria

• Photosynthetic Bacteria

• Animals

• Plants

Anaerobic

• with oxygen

• without oxygen

Aerobic

• With Oxygen

• Without Oxygen

An explanation of the natural world. Describes how or why something is.

• theory

• fact

• law

• rule