Which of these situations is the main threat to the survival of polar bears? a. polar bears pose a danger to humans b. polar bear pelts are in high global demand c. climate change is melting the ice in polar bears’ hunting territory d. humans are encroaching on polar bear habitat

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?

What was darwins theory of common decent

This is collection of data made by comparing objects in standard units. in science, the units are metric.