1. When can two parent plants with purple flowers produce offspring with white flowers?

if purple is the dominant allele (P) and white is the recessive allele (p) then it would be possible if both parents had the genotype Pp, then it would be possible for both parents to pass on the recessive gene (p) and have offspring with white flowers

compost can be added to topsoil as a:

pesticide

a) carbon, hydrogen

b) carbon, hydrogen, oxygen, nitrogen

c) carbon, hydrogen, oxygen, nitrogen, phosphorus

d) sugar

e) amino acid

f) nucleotide