. Poison glands of snakes are homologous to (a) Electric organs of fishes (b) Stings of rays (c) Sebaceous glands of mammals (d) Salivary glands of vertebrates

Poison glands of snakes are homologous to 1 Stings of rays 2 Salivary glands of vertebrates 3 Electric organs of fishes 4 Sebaceous glands of mammals

SSC,

What are homologous chromosomes? Which are the human cells that do not have homologous chromosomes?