Farmer brown sprays insecticides on his crops to kill insects. several days after spraying, he notices many dead bugs around the pond. that summer, the number of frogs around the pond was lower than ever. the frog population has declined because a) the chemical killed the frogs. b) farmer brown scared the frogs away. c) bugs are the limiting factor for the frogs. d) the chemical spray is a limiting factor for the bugs.

Every compound can be represented by a chemical formula. a chemical formula is the set of symbols showing the elements that make up a compound and their proportions. water’s chemical formula is h 2 2 o. that means a molecule of water contains two atoms of hydrogen and one atom of oxygen chemically bonded. a molecule is a group of two or more atoms bonded together. molecules can range in size from two to thousands of atoms. a molecule of a compound is the smallest unit of that compound. every molecule of water has all the physical and chemical properties of water. that’s because every molecule of water is made of the same elements in the same proportions: two hydrogen atoms and one oxygen! which of the following is a true statement? a every molecule of the same compound will have different properties. b every molecule of a compound has the same proportion of elements. c molecules can be physically separated into smaller units of a compound. d molecules cannot be represented by chemical formulae.

Agene in a type of bacteria when the ses bacteria reproduce asexually this mutation can only be inherited by

What would happen if the krill were removed from the food web