Answer:
A dichotomous key is a tool created by scientists to help scientists and laypeople identify objects and organisms. ... Dichotomous keys are very useful because they allow non-expert users to identify organisms by directing them to look at the known, important organisms.
Because the have hollow bones, feathers, wings, beaks, and they lay eggs
Stored energy. Also this should have been listed under physics lol
Any cells of the human body, except the cells of a placenta.
Answer: Only 10 percent of energy in a light bulb is used to create light. ...
The amount of energy Americans use doubles every 20 years. ...
Explanation: