Amongst animals,insects comprise

Which of the following statements is correct regarding biodiversity?

There are $..........$ species of orchids on Earth.

Choose the correct matching for the Amazon rainforest biodiversity data: $a$-mammals,$b$-$1300$ species,$c$-$3000$ species,$d$-$427$ species,$e$-birds,$f$-fishes.

The variation shown by the medicinal plant $Rauwolfia \text{ } vomitoria$ growing in different Himalayan ranges represents:

Name the three important components of biodiversity.