Which type of anatomic structure are bird wings and butterfly wings when compared to each other?
a. vestigial
b. homologous
c. analogous
d. heterologous

Which of these substances does not protect against invaders in the nonspecific immune response? a. saliva b. mucus c. tears d. urine

Which statement describes compounds a. compounds are made of one type of atom. b. compounds cannot be represented by models. c. compounds are represented by chemical formulas. d. compounds cannot be broken down into simpler forms.

Plz ! what does it mean for an allele to be dominant?