Sorry, don't answer if you don't know, I need help with all three of them please

Which example describes a mutualistic relationship between organisms? young wasps prey on caterpillars. crabs eat the remains of dead fish. tapeworms feed on food in the intestines of cats ants protect a tree on which they feed.

What does the number 18.9984 represent in the image?

Genes that come together with different alleles are heterozygous. homozygous. genotype. segregated.