Thorn of Bougainvillea and tendril of Cucurbita are examples of

Homologous organs are ............. .

The wings of birds and the wings of insects are $.........$.

Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A$: Forelimbs of humans and bats are homologous.
Reason $R$: Forelimbs of humans and bats have similar anatomical structure.
In the light of the above statements, choose the most appropriate answer from the options given below:

Which of the following is a connecting link showing organic evolution?

Which of the following are $NOT$ analogous organs?