Which of the following did you include in your
response? Check all that apply.
Seedless plants produce spores.
Spores can develop into an adult without
fusing with another cell.
Seed plants produce seeds.
Seeds are formed when the female
reproductive structure matures; this occurs
after fertilization.
DONE

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

How are gross production and net production different? a. net production is always greater than gross production. b. net production is always less than gross production. only animals have net production. d. only plants have net production. select the best answer from the choices provided

The law of thermodynamics states that energy can't be created or destroyed. to natural sources of energy on earth are the