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A single group of test units is first exposed to a treatment,and then a measurement is taken on the dependent variables.Which experimental design is this?
Fossil Record
The collection of fossils, which provides historical evidence of past life and evolution on Earth.
Ferns
Ferns are non-flowering vascular plants that reproduce via spores and have fronds, belonging to a group called Pteridophyta.
Amphibians
Cold-blooded vertebrates that can live both in water (using gills to breathe) and on land (breathing with lungs) at different stages of their life.
Prebiotic Soup Hypothesis
A theory suggesting that life on Earth began in a "soup" of organic molecules, possibly in the oceans, facilitated by energy from sunlight or geothermal sources.
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