What is the original source of energy for gasoline? -plants
-Sun
-petroleum
-fossil fuels

Aplant has an egg with 34 chromosomes how many chromosomes does a leaf cell of that plant have

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 is hydroelectric power produced by?