Which of the following best describes a macromolecule?

a) a simple molecule containing only carbon and oxygen
b) a large molecule made up of many molecular subunits and consists of a large number of atoms
c) the smallest basic unit of matter
d) a group of like atoms formed through ionic bonding

In tomato plants, mendel found that the allele for smooth seeds (s) is dominant, while the allele for wrinkled seeds (s) is recessive. which of these punnett squares shows crosses between two plants heterozygous for smooth seeds? i need this to be answered as soon as ! sry the picture is bad quality