Mary wants to test what brand of plant food will make her petunias bloom the most flowers. For ten plants, she gives them just water. For the next ten plants, she gives them "Granny's Bloomers
Flower Food." She gives the last ten plants "Plenty O'Petals" plant food. Each day she counts and
records the number of flowers on all 30 plants.

what are 2 constants? someone please help!

Elements and compounds are pure substances that cannot be broken down physically into a simpler substance. a physical change doesn’t break the bonds between atoms of a substance or form new ones. compounds can be broken down by a chemical change. a chemical change breaks chemical bonds and/or forms new ones between atoms of a substance. what simple substance would a compound break into? the basic elements that make it up! for example, if you passed a very strong electric current through water you’d break the chemical bonds in water and be left with oxygen and hydrogen. which of the following is an example of a chemical change? a separating water into different glasses b breaking frozen ice cubes with a hammer c running an electric current through water d boiling water to evaporate it on a stove

Provide one reason why mitosis occurs.

Competition occurs between species when