The bones of the fingers and toes (phalanges) are categorized as bones. a. long b. irregular c. short d. flat e. sesamoid

long

The bones are classified into 5 types according to their shapes: long, irregular, short, flat or sesamoid. The phalanges (bones of the fingers and toes) are classified as long bones, meaning they are longer than they are wide. 

"do a testcross with a homozygous recessive plant."

the answer is c because it is most logical.