Select the best answer

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

Which of the following is an organic item? ant battery brick glass

Which demonstration illustrated that retrieval from memory is not just a reproductive process, but a reconstructive process?

A group of events or individuals that represent a population is?

Why does sugar move to the roots through the phloem during the summer months?

Why is carbon the backbone of liveing things

When an accurate experiment is repeated by another scientist, the results A) should be similar to those obtained originally. B) will be identical every time the experiment is repeated. C) should be completely different for a different scientist.

1. Which of the following forms all matter?

True or false Sedimentary rock can be formed from changes in igneous rock, but igneous rock cannot be formed from changes in sedimentary rock.

When a protein is denatured, why does it lose its functionality?

This is a rotating machine that converts the kinetic energy of the wind into mechanical energy. If the mechanical energy is used directly by machinery, such as a grinding stone, the machine is usually called a windmill.