Question

1. Thorns of bougainvillea and the thorns of citrus plant are A)homologous organs B) Analogous orgnans Please could i get the ans with explanation as to how 2. How can we say that the tendrils of a pea plant and the swollen stem of cactus are homologous organs .

Answer 1

1 they are homologous organs because both the stem modification but their functions are different. thorn provide protection to plant against predators while tendril help plant to climb or support.
2. tendrils of pea plant and swollen stem of cactus are analogous organs since tendril of pea plant is leaf modification while swollen stem of cactus is stem modification  . they perform similar function