Cyanobacteria are most responsible for ...

A) creating multicellular organisms

B) oxygenating the Earth

C) creating archea

D) creating carbon dioxide

Which mechanism affected the gene pool of the immigrants that entered the United States through Ellis Island? - genetic drift - gene flow - gene mutation - natural selection

The phase of mitosis where the chromosomes first become visible is called

Which of the following statements is false? Two or more atoms combine chemically to form a molecule. Two or more different substances combine physically to form a mixture. Two or more elements combine chemically to form a compound.

Computers are so powerful that k-12 educators and students are now able to produce their own multimedia and webased learn materials

Hotspots are produced by mantle plumes that are composed of mafic magma; however, yellowstone is a hotspot that erupts more explosively because the hotspot

Select the correct answer. Which of the following is the correct definition of a biography? OA an account of a fictitious experience that relies on figurative language B. an account of a single significant experience in a person's life C.

Acid rain is the direct result of acid released by burning fossil fuels. True False

List five properties that are used most commonly to identify minerals.

What are the basic building blocks of DNA and RNA? A. nucleotides B. phosphorous O C. proteins D. sugar Reset

What is a good description for the cell wall?