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Which of the following events define the Proterozoic eon?

-eukaryotic cells first seen

-stable continents

-first bacterial fossils

-Cambrian explosion

-oxygen builds up in atmosphere

What way of life resulted from the domestication of animals

In which stages of meiosis are the chromosomes considered tetrads?

A student conducted an experiment to determine the molar concentration of solutes in chicken eggs. Eggs were soaked in vinegar to remove the shells the eggs were then placed in sucrose solutions of different concentrations.

Describes longitudinal waves

Liquid has a volume of 12.0 mL and a mass of 6g what is the density

What role does fish have on india

Which of the following planets has the longest orbital period? a. Neptune c. Venus b. Jupiter d. Earth

What type macromolecule is used to make energy carbohydrates lipids proteins nucleic acids

A scientist at the polar ice cap was studying an ice sample from hundred of meters below the surface. While examining the ice, the scientist found some cells from many years ago.

An individual living entity is referred to as what A: Cell B: Organism C: Organ D: Tissue