1) q: a: pesticides are used to protect crops from insects and other pests. but sometimes pesticides can be as harmful as they are useful. how can pesticides be harmful?

Based on the results of this study, what questions remain unanswered? how can these questions guide future research

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?

This is the diveristy of ecosystems natural communites and habits it is the variety of ways that species interact with each other and their environment