Rain forests are home to 90,000 of the 2,50,000 identified plant species in the world. What per cent of the world’s identified plant species are found in rain forests?

Which of the following is a keystone species in tropical rain forest ?

Among the given plant groups, the highest number of species diversity in the world is represented by ?

Assertion : India is one of the 12 mega diversity countries of the world. Reason : India has only 2.4 per cent of world's land area, but its share of the global species diversity is an impressive 8.1 percent.

In the last 500 years, how many species of plants have become extinct from world?

In the last 500 years, how many species of plants have become extinct from world?

Which of the following statement (s) about taxonomic aids is/are true I. Keys are used to identify plants and animals based on similarities and disimilarities. II. Flora contains the account of habitat and distribution of plants in a given area. III. Flora provides an index to the plant species found in a particular area. IV. Monographs provide information for identification of species found in an area

How many of the following statements are CORRECT ? I. India is one of the 12 megadiversity countries of the world. II. India has only 8.1 percent of the worl's land area. III. Nearly 45,000 species of animals and twice as many as plants have been recorded from lndia. IV. According to May's global estimates , only 22 percent of the total species have been recorded so far. v. Nature's biological the library is burning even before we catalogued the titles of all books stocked there.