BIOLOGY 1 Marks Question

1. Genetic diversity.
2. Genetic diversity.

Genetic Biodiversity.

1. Fungi.
2. Angiosperm.

1. Mammals.
2. Amphibians.

1. Genetic diversity.
2. Ecological diversity.

Gametes of threatened species/seeds of commercially important strains can be preserved, in viable and fertile condition/for long periods.

a - Insects.b - Molluscs.

Over exploitation by humans.

The International Union for Conservation of Nature and Natural Resources.

Western Ghats and North East region.

The mangroves represent biodiversity at ecological level. Other examples of ecological diversity are deserts, rainforests, coral reefs, etc.

Areas that protect and maintain ecologically unique and biodiversity rich regions.

North East, North West, Western Ghats and Andman Nicobar islands.

Population, pollution and ecological imbalance will rise up.

Dodo.

Amazonian rainforest in South America.

Edward Wilson.

Western Ghats and Eastern Himalayas.

Endemic species are native species restricted to a particular geographical region. Exotic species are species which are introduced from other geographical regions into an area.

Agricultural fields like wheat field or paddy field which are also examples of monoculture practices.

A national park is a protected area reserved for wildlife where human activities are not permitted.

Western Ghats.

Jim Corbett National Park (Uttarakhand) and Kaziranga National Park (Assam).

The Earth Summit.

It can be inferred that Western Ghats have a greater species diversity.

The Earth Summit was held at Rio de Janeiro (Brazil) between 3-14 June, 1992.

Alien species are plants, animals or microorganisms that are transported and established in a new area beyond their natural range.

By creating biosphere reserve.

Edward Wilson.

The variety in the number and richness of the species in a region is called species diversity.
The number of species per unit area is species richness.

It is because this region has a very high level of species richness and endemism.

Non-native powerful species which invade a new area are known as alien species.

The diversity at the species level (types and numbers), is called species diversity.

Keoladeo Ghana bird sanctuary, Bharatpur (Rajasthan) and Periyar sanctuary (Kerala).

International Union for Conservation of Nature and Natural Resources.

Human activities causing loss of biodiversity in Amazon rainforest are:

1. Many plants are cut for cultivation of soybean.
2. Forests are converted to grasslands for raising beef cattle.

1. Thylacine.
2. Dodo.

India has much of its land in the tropical latitudes and has a number of ecosystems like deserts, mangroves, rain forests, coral reefs, wetlands and estuaries; hence, it has greater ecosystem diversity whereas Norway is located in the temperate latitudes and hence, shows less diversity.

2002.

Rauwolfia vomitoria.

A- insects; they are found in almost all types of habitats.
B- Fishes; they are aquatic, both freshwater and sea water.

Clarias gariepinus (African catfish)

1. Extinct.
2. Critically endangered.
3. Endangered.
4. Vulnerable.
5. Lower risk.
6. Not evaluated.

A biosphere reserve is a specified area in which multiple use of land is permitted by dividing it into several zones and each zone is specified for a particular activity.
Importance:

1. They are a means of conserving genetic resources, species, ecosystems and landscapes without disturbing the local people.
2. It helps in restoration of degraded ecosystems and habitats.

Nile Perch.

Threatened species are those organisms facing a very high risk of extinction in the wild in the near future.

International Union of conservation of Nature and Natural Resources.