Please help and try to give correct answer! How are the processes of weathering and erosion similar?

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?

In the african savanna, more wildebeests are born than the environment can support. which is most likely to happen over a period of years as a result

What is the compliment dna strand to the following sequence: ttgactaggcta