Question
Sat February 14, 2009 By:

awefully awesome question

Expert Reply
Thu February 19, 2009

Spine of Cactus and thorn of Bougainvillea are analogous structures. This is because their basic origin is different. Opuntia i.e. cactus spines are leaf modifications whereas thorns of Bougainvillea are stem modifications.

Related Questions
Sun November 19, 2017

What is meant by gametogenesis?

Home Work Help