Home
Class 12
BIOLOGY
What is the total number of species pres...

What is the total number of species present on earth as estimated by Robert May ?
(a) 3 million
(b) 5 million
(c) 7 million
(d) 9 million

Text Solution

Verified by Experts

The correct Answer is:
C

Robert May estimated that about 7 millon species are present on earth.
Promotional Banner

Similar Questions

Explore conceptually related problems

A more conservative and scientifically sound estimate about the total number of species present on earth, was made by (a) Robert May (b) Paul Ehrlich (c) David Tilman (d) Both A and B

Presently, total number of biodiversity hotspots in the world is (a) 25 (b) 34 (c) 37 (d) 40

In a grassland ecosystem, if the number of primary producers (plants) is approximately 6 million, the number of top carnivors. Which may be supported by them will be

Which of the following statements regarding the ethical argument for conserving biodiversity is incorrect? (a) We owe to millions of plant, animal and microbes species with whom we share this planet (b) Every species has an intrinsic value only when it is of an economic value to us. (c) It is our moral duty to care for the well-being of all species i.e., our biological legacy. (d) All of these

Western ghats have a greater number of amphibian species than the Eastern ghats. What kind of diversity does it represent ? (a) Species diversity (b) Genetic diversity (c) Ecological diversity (d) None of these

Which of the following is a reason for the greater biological diversity of tropical regions ? (a) Tropical latitudes have remained almost undisturbed for millions of years. (b) Tropical environments are less seasonal, relatively more constant and predictable. (c) More solar energy is available in the tropics, resulting in high productivity. (d) All of these

According to May's global estimates how many species of plants and animals, respectively, are yet to be discovered and described from India ? (a) 50,000 and 90, 000 (b) 3,00,000 and 90,000 (c) 3,00,000 and 1,00,000 (d) 1,00,000 and 3,00,000

Study the following statements regarding lactic acid bacteria (LAB) which are used to convert milk into curd. (i) They produce acids that coagulate and partially digest the milk proteins. (ii) A small amount of curd added to the fresh milk as an inoculum contains millions of LAB , which at suitable temperature, multiply and convert milk into curd. (iii) Conversion of milk into curd improves its nutritional quality by increasing vitamin B_(12) . (v) LAB may result in acidity in the stomach of human beings. Which of the given statements are correct ?

What is common to the following plants: Nepenthes Psilotum, Rauwolfia and Aconitum ? (a) All are ornamental plants. (b) All are phylogenic link species. (c) All are prone to over exploitation. (d) All are exclusively present in the Eastern Himalayas.