Unit 1: Origins of Life

HOW OLD IS THE EARTH WE LIVE IN?

• 4,6 billion years old

• 2000 YEARS OLD

• 5 BILLION YEARS OLD

what are Prokaryotes which have evolved, with photosynthesising bacteria called.

• cyanobacteria

• kynobacteria

____________ & _________________ are organelles that arose from prokaryotes, according to the endosymbiotic theory

• Nucleus and cell membrane

• Chloroplast and mitochondria

• Mitochondria and nucleus

• Cell wall and chloroplast

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How long ago did the Great Oxygenation Event Occur?

• 1.6 billion years ago

• 2.5 billion years ago

• 300 million years ago

• 653 million years ago

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From Week 1:

The great oxygenation event released which element into the atmosphere?

• Nitrogen

• Hydrogen

• Oxygen

• Boron

cells with no nucleus are called

• prokaryotic
• eukaryotic
• dead
• alive

Tags

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The smallest unit of life is a(n)

• atom
• cell
• snail

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What does reproduce mean?

• They grow - get larger
• They are living things
• Organisms make other organisms

Living things respond to heat, light, and sound.  This means they respond to:

• stimuli/ environment
• suction
• Dr. Suess
• digestion

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During ___________ conditions inside our body are kept stable (the same)

• homeopathic
• Homo sapian
• homeostasis
• homologous

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