What Source of Energy Was Used to Trigger the Manufacture

question 60

Multiple Choice

What source of energy was used to trigger the manufacture of complex organic compounds in laboratory simulations of conditions in primordial planetary atmospheres?

• A) thermal heating, to simulate volcanic heating
• B) electric discharges, to simulate lightning
• C) heat from chemical reactions in early reactive planetary atmospheres
• D) UV and visible radiation, to simulate the intensity of sunlight at earlier times in planetary life

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Definitions:

Tubular Digestive System

A type of digestive system in which the digestive tract forms a continuous tube from mouth to anus, allowing for sequential processing of food.

Roundworms

A group of invertebrates belonging to the phylum Nematoda, characterized by long, cylindrical bodies.

Cambrian

A geological period approximately 541 million years ago, marked by a rapid diversification of life in the Earth's oceans.

Proterozoic

An eon in the geologic timescale, following the Archean and preceding the Phanerozoic, characterized by the first evidence of oxygen in the atmosphere and multicellular life.