Were there any eukaryotic cells on earth 1.5 billion years ago?

Which major processes were needed for the origin of life on Earth?

Toxins from seafood, mushrooms and mold present great potential for

What are some examples of organisms that adapt to their environment that become better suited for their environment

What are the chemical elements necessary for life?

As you hike from the highest elevation to the lowest elevation, you find three different species of related mice. None of them are found at the same elevation, and the vegetation changes at each elevation level.

Which of the following correctly describes the size of the Milky Way galaxy?

The fossil record shows that two groups of organisms are related, which means they share a

The sun is A. An unusally hot star B. A very cool star C. A typical star D. None of the above

Which plant is often used as a soil conditioner Some Moss A Fern Some Horsetail Or maybe some Hornwort I just put my own little twist in words but the questions are Moss, Fern, Horsetail, and Hornwort

Astronomers studying the planet of Acer have detected igneous rock under its surface. One astronomer makes a claim that some of the material that this igneous rock formed from used to be in sedimentary rock on the surface of Acer.