Why are some amino acids called "essential amino acids"?

Clara wrote the following hypothesis for an experiment about acidophilic bacteria. Bacteria cells will stop dividing in a basic (alkaline) environment because of the high pH.

What is the correct order of sedimentary rock formation?

Which of the following is an example of matter? a) ideas b) sound c) water d) energy

Which statements accurately describe long-term environmental changes? Check all that apply. Long-term environmental changes cause changes in genetic makeup. Long-term environmental changes happen suddenly with little warning.

What 4 things can happen when light hits the border between two different mediums?

The group of polar bears that live along the eastern coast of Russia makes up an organism.

Which is an example of acquisition of natural passive immunity? which is an example of acquisition of natural passive immunity?

Which of the following best describes how energy is transferred in a food web? A. A All energy is transferred to each level of a food web. B. B Energy flows from producers to one or more levels of consumers. C.

As relative humidity increases, what happens to hair?

Name four weathering is caused by