TED: The tiny creature that secretly powers the planet | Penny Chisholm

The video explores the significance of Prochlorococcus, a tiny photosynthetic organism that plays a crucial role in Earth's ecosystems. It discusses the evolution of photosynthesis, the discovery of Prochlorococcus, and its genetic diversity. The video also highlights the impact of climate change on these organisms and the potential lessons they offer for reducing fossil fuel dependency.

What is the significance of Prochlorococcus in Earth's history?

• It is a type of fossil fuel.

• It is responsible for the extinction of dinosaurs.

• It is a recent discovery with no historical impact.

• Its ancestors contributed to the creation of oxygen in the atmosphere.

How do phytoplankton contribute to ocean ecosystems?

• They only exist in freshwater environments.

• They are harmful to marine life.

• They deplete oxygen levels in the ocean.

• They are a primary food source for ocean animals.

What technology was used to discover Prochlorococcus?

• Genetic engineering

• X-ray crystallography

• Flow cytometry

• Electron microscopy

Why is Prochlorococcus considered highly efficient in photosynthesis?

• It grows only in freshwater.

• It has minimal structural components to maintain.

• It requires no sunlight.

• It has a large biomass.

What is unique about the genetic diversity of Prochlorococcus?

• Each strain has a unique set of genes adapted to its environment.

• All strains have identical genes.

• It has more genes than any other organism.

• It has no genetic diversity.

How does the genetic makeup of Prochlorococcus compare to a smartphone?

• It has no core genes.

• It cannot adapt to different environments.

• Its genes are like apps that can be customized.

• It has more genes than a smartphone has apps.

What is the projected impact of climate change on Prochlorococcus populations?

• Their populations are expected to expand.

• They will become extinct.

• They will remain unchanged.

• Their populations are expected to decrease.

What role does Prochlorococcus play in the global carbon cycle?

• It releases carbon dioxide into the atmosphere.

• It fixes carbon dioxide into organic carbon.

• It has no role in the carbon cycle.

• It only affects terrestrial ecosystems.

What is the potential consequence of reduced larger phytoplankton populations?

• Increased fish populations

• More abundant coral reefs

• Decreased zooplankton populations

• No impact on marine life

Why is Prochlorococcus considered a 'superorganism'?

• It is unaffected by environmental changes.

• It has a single, uniform genetic makeup.

• It has a vast gene pool allowing adaptation to various environments.

• It is the largest organism in the ocean.