Describe the word difference between a chemical change and a physical change

Imagine ? person stepping on a pin and pulling his or her foot way look at the réfléchir arc of the scenarios below

Aboy with an extra x chromosome probably has which of the following syndromes?

Acertain species of fish can have either long or short fins. the allele for long fins is dominant over the allele for short fins. a heterozygous, long-finned fish is crossed with a homozygous, short-finned fish. of the offspring, will have long fins and be , and will have short fins and be .