This Worm-y Critter Is (Probably) Our Oldest Ancestor | SciShow News

The video explores the discovery of ancient bilaterian fossils, Ikarya Wariootia, which may push back the origin of bilaterians by millions of years. It also delves into the study of microbial communities on human tongues, using advanced imaging techniques to understand their structure and potential health benefits, such as regulating blood pressure through nitric oxide production.

What characteristic is shared by all bilaterians?

• Asymmetry

• Radial symmetry

• Spiral symmetry

• Bilateral symmetry

What evidence did researchers find to support the existence of early bilaterians?

• Vertical tunnels in rocks

• Horizontal tunnels in fossilized sand

• Circular imprints in clay

• Fossilized footprints

What is the significance of the Ikarya wariodia fossils?

• They may represent the earliest bilaterians

• They indicate the presence of early plants

• They are the first evidence of vertebrates

• They show the first use of tools

What technique was used to visualize microbial communities on human tongues?

• X-ray imaging

• Ultrasound imaging

• MRI scanning

• Classy fish imaging

How do researchers distinguish between similar-looking microbes in their studies?

• By using different types of microscopes

• By labeling them with fluorescent pigments

• By measuring their size

• By observing their movement patterns

What role do oral microbes potentially play in human health?

• Causing tooth decay

• Regulating blood pressure

• Enhancing taste perception

• Increasing blood sugar levels

What molecule do some oral microbes help produce that impacts health?

• Hydrogen peroxide

• Carbon dioxide

• Nitric oxide

• Oxygen