Introduction to Biodiversity

Q.

What are the 5 major threats to biodiversity?

Q. Why don't you observe the some flowers Of the following plant cucumber, mango, peepal , coriander, papaya, onion, labia, cotton, ? Try to find out which animal visit them and whether they could be pollinators

Q. Discuss the main reason for the low productivity of the ocean.

Q. Why is the availability of fruits like mango, apple, jackfruit, etc. seasonal?

Q.

What causes the diversity of life?

Q.

In a given habitat we have 20 plant species and 20 animal species. Should we call this as 'diversity or biodiversity'? Justify your answer.

Q.

Name the three important components of biodiversity.

Q.

Forests are biodiversity hotspots. Explain.

Q. What are the main threats of biodiversity?

Q. The sum total of all the species in a given area is known as

1. diversity
2. biodiversity
3. variation
4. diversification

Q.

What is the role of sacred groves in conserving biodiversity?

Q. The productivity of whole biosphere and terrestrial ecosystem respectively is

1. 170, 55 bt
2. 115, 70 bt
3. 170, 115 bt
4. 55, 115 bt

Q. Consider the following statements.
$1$. Biodiversity hotspots are located only in tropical regions.
$2$. India has four biodiversity hotspots, i.e., Eastern Himalayas, Western Himalayas, Western Ghats and Andaman and the Nicobar Islands.
Which of the statements given is/are correct?

1. $2$ only
2. Both $1$ and $2$
3. Neither $1$ nor $2$
4. $1$ only

Q. The sum total of all the species in a given area is known as

1. diversity
2. biodiversity
3. variation
4. diversification

Q. Ecologically what does standing crop means?

1. 
   Totality of all trophic levels, both animals and plants, comprising it
2. 
   The trophic level made up of primary producer only i.e. green plants only
3. 
   The trophic level made up of primary consumers only
4. 
   The trophic levels of consumers of all orders

Q. Does the number of species in a community really matter to the functioning of the ecosystem?

Q.

How does the loss of species diversity affect an ecosystem?

Q. Match column A with column B and choose the correct option.

Column A (Taxonomic group)	Column B (% of threatened species)
1. Birds	a. 32
2. Mammals	b. 23
3. Amphibians	c. 12
4. Gymnosperms	d. 31

1. 1 - c, 2 - b, 3 - a, 4 - d
2. 1 - b, 2 - c, 3 - a, 4 - d
3. 1 - a, 2 - b, 3 - d, 4 - c
4. 1 - d, 2 - b, 3 - a, 4 - c

Q. One of the twelve-mega biodiversity countries of the world is ________.

1. The USA.
2. India
3. The United Kingdom.
4. Africa.

Q. Which is the national aquatic animal of India

1. Sea horse
2. Gangetic shark
3. Blue whale
4. River dolphin

Q.

Wildlife includes

1. animals, plants and microorganisms in their natural habitat

2. ​​​​cultivated plants and domestic animals

3. ​​​​​​only wild animals in their natural habitat

4. ​​​​​​ only wild plants in their natural habitat

Q. Cross-pollination is preferred over self-pollination because it?

1. Induces parthenogenesis
2. Forms new varieties
3. Produces better offspring
4. Is economical

Q. National aquatic animal of India is

Q.
Biodiversity of a geographical region represents

1. Genetic diversity within the dominant species of the region
2. Species endemic to the region
3. Endangered species found in the region
4. The diversity among the organisms living in the region

Q. The Earth summit held in Rio de Janeiro (1992) stressed the need for

1. Control of air pollution
2. Controlling global warming
3. Conservation of biodiversity
4. Protecting the Antarctica region

Q. Regarding the assertion and reason, select the correct option:
Assertion [A]: There is a direct correlation between plant diversity and presence of pollinators.
Reason [R]: Pollination is the process by which pollen is transferred to the stigma through pollinators like bees, birds and wind.

1. A is incorrect but R is correct
2. Both A and R are incorrect
3. A is correct but R is incorrect
4. Both A and R are correct and R explains A
5. Both A and R are correct but R does not explain A

Q. Why is the availability of fruits like mango, apple, jackfruit, etc. seasonal?

Q. Biodiversity can be defined as the variety and variability amongst life forms_______.

1. at all levels of biological organisation
2. only at species level
3. only at genetic level
4. only at ecosystem level

Q.

If the given diagram shows global biodiversity of animals then which category is ‘x’?

1. Mollusca

2. Insects

3. Crustaceans

4. Amphibia

Q. India is one of the world's richest countries in, terms of its vast array of biological diversity, and has nearly ________ of the total number of species in the world.

1. Six per cent
2. Four per cent
3. Eight per cent
4. Three per cent
5. None of these