a proposed scientific explanation for a set of observations
group of cells that form from a single cell
information gathered from observations
A decimal system of measurement whose units are based on certain physical standards and are scaled on multiples of 10
process of keeping internal conditions fairly constant
a technique to separate the different cell parts
device that produces magnified images of structures that are too small to see with the unaided eye
science that seeks to understand the living world
well-tested explanation that unifies a broad range of observations
a natural process resulting in the evolution of organisms best adapted to the environment
Please allow access to your computer’s microphone to use Voice Recording.
We can’t access your microphone!
Click the icon above to update your browser permissions above and try again
Reload the page to try again!
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Your microphone is muted
For help fixing this issue, see this FAQ.