What event characterized the Paleozoic era?

Gold is found mostly in igneous or metamorphic rocks. When water acts upon these rocks, gold may be carried and distributed to streams.

What scientific questions could Clyde ask about the compost pile? Check all that apply. Which item breaks down the fastest? Does decaying fruit smell the worst? Will the items break down faster if heat is added?

What evidence do scientists offer to support their idea that the African elephants are two different species?

A solution with a pH of 11.0 is

During pregnancy, a cell undergoes what appears to be a normal mitotic nuclear division. However, two daughter cells with 2n-1 and 2n+1 complement of chromosomes are produced, causing a population of cells to be abnormal.

Which of the following personal health conditions can be controlled by exercise and diet?

How do sewers at the bottom of the ocean affect it's ecosystem

Can a grasshopper survive if its head is underwater

A scientist makes the argument that she has found DNA evidence that shows that evolution does not exist. What would her evidence have to show for her to be correct?

What are transcription and translation as they relate to DNA and RNA?