State the evolutionary relationship giving reasons between the thorn of Bougainvillea and tendril of cucurbit.

Thorn of Bougainvillea and tendril of Cucurbita are examples of :

Tendrils of Cucurbita and thorns of Bougainvillea are

Identify the examples of homologous structures from the following- (i) Vertebrate hearts (ii) Thorns in Bougainvillea and tendrils of Cucurbita. (iii) Food storage-organs in sweet potato and potato.

Which of the following are not analogous organs :- 1 Fins of fishes and flippers of whales 2 Stings of honey bee and sting of scorpion 3 Thorn of bougainvillea and tendril of cucurbita 4 Wings of insects and wings of birds