What is the difference between physical properties and chemical properties of matter? A. physical properties are recognized when substances react with one another, while chemical properties do not change the composition of matter,
B. physical properties cannot be studied, while chemical properties of matter can be studied
C. physical and chemical properties are the same thing
D. physical properties do not change the composition of matter, while chemical properties can be recognized only when substances react or don't react with one another

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given bodies of water

pacific / arctic / indian / southern

[ a ] the caribbean sea

[ b ] the northern ocean

[ c ] the atlantic ocean

[ d ] the barents sea

with this being the given answers

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds

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multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).   so the answer is a.