Based on fossil evidence, about how long ago did the first single celled life fork appear on earth?

Why is it better to add organic fertilizers like milorganite to your soul than synthetic or chemical fertilizers

Part of the elbow is formed by the end of the humerus. What do you call this part?

Trace elements are those required by an organism in only minute quantities. Which of the following is a trace element that is required by humans and other vertebrates, but not by other organisms such as bacteria or plants?

In some kinds of organisms, reproduction occurs asexually which means what about the parents and offspring DNA?

How is Mitosis and Meiosis Different? * A. Mitosis makes diploid cells and Meiosis makes haploid cells B. Mitosis makes body cells and Meiosis makes reproductive cells C. Mitosis makes 2 cells and Meiosis makes 4 cells D. All of the above

the process of taking material into the cell by means of infoldings of the cell membrane.

What do both the theory of evolution and the cell theory have in common as scientific theories?

You are part of a desert plant research team trying to discover crops that will be productive in arid climates. you discover a plant that produces a hormone under water-deficit conditions that triggers a suite of drought responses.

Cual es la diferencia entre ciencia y biología

What parts of the atmosphere interact?