According to Barry Commoner, there are Four Laws of Ecology. Explain how his laws govern the way nature does - and humans should - use energy and material resources in
order to protect biodiversity. The Four Laws of Ecology
a. Everything is connected to everything else.
b. Everything must go somewhere.
c. Nature knows best.
d. There is no such thing as a free lunch.

25) a student takes four samples of a white crystalline solid and places each in a well plate. on top of each sample, she carefully places 20 drops of clear mystery liquids a, b, c and d. her results for each well are: liquid a: the solid dissolves quickly. liquid b: the solid appears unchanged. liquid c: a brownish colored liquid is produced. liquid d: fizzing occurs and the well becomes warmer. in which well does a physical change occur?

Ascientist and her team counted 200 individual deer in an area of 10 square kilometers. what is the population density?

Four different thermometers were used to measure the temperature of a sample of pure boiling water. the measurements are recorded in the table below. thermometer temperature reading 1 temperature reading 2 temperature reading 3 w 100.1°c 99.9°c 96.9°c x 100.4°c 102.3°c 101.4°c y 90.0°c 95.2°c 98.6°c z 90.8°c 90.6°c 90.7°c the actual boiling point of pure water is 100.0°c. what can be concluded from the data about the reliability and validity of the thermometers?