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BIOLOGY 1 Marks Question

Biodiversity and Conservation · Gujarat Board (GSEB) STD 12 Science (GSEB - English Medium). 103 questions.

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Question 11 Mark
Name the type of biodiversity represented by the following:
  1. 1000 varieties of mangoes in India.
  2. Variation in terms of potency and concentration of reserpine in Rauwolfia vomitoria growing in different regions of Himalayas.
Answer
  1. Genetic diversity.
  2. Genetic diversity.
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Question 21 Mark
India has more than 50,000 strains of rice. Mention the level of biodiversity it represents.
Answer
Genetic Biodiversity.
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Question 31 Mark
Name the unlabelled areas ‘a’ and ‘b’ of the pie chart representing the biodiversity of plants showing their proportionate. Number of species of major taxa.

Answer
  1. Fungi.
  2. Angiosperm.
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Question 41 Mark
Identify ‘a’ and ‘b’ in the figure given below representing proportionate number of major vertebrate taxa.

Answer
  1. Mammals.
  2. Amphibians.
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Question 51 Mark
Name the type of biodiversity represented by the following:
  1. 50,000 different strains of rice in India.
  2. Estuaries and alpine meadows in India.
Answer
  1. Genetic diversity.
  2. Ecological diversity.
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Question 61 Mark
Write the importance of cryopreservation in conservation of biodiversity.
Answer
Gametes of threatened species/seeds of commercially important strains can be preserved, in viable and fertile condition/for long periods.
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Question 71 Mark

Name the unlabelled areas ‘a’ and ‘b’ of the pie chart (given above) representing the global biodiversity of invertebrates showing their proportionate number of species of major taxa.

Answer
a - Insects.

b - Molluscs.

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Question 91 Mark
Give the categories of species mentioned in Red list.
Answer
  1. Extinct.
  2. Critically endangered.
  3. Endangered.
  4. Vulnerable.
  5. Lower risk.
  6. Not evaluated.
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Question 111 Mark
What is a national park?
Answer
A national park is a protected area reserved for wildlife where human activities are not permitted.
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Question 121 Mark
Why is India said to have greater ecosystem diversity than Norway?
Answer
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.
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Question 141 Mark
What is genetic diversity?
Answer
It is the measure of variety in genetic information contained in the organisms.
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Question 151 Mark
What is the general range of the value of slope of the line of regression for any taxa in any region?
Answer
0.1 to 0.2.
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Question 161 Mark
What are protected areas?
Answer
Areas that protect and maintain ecologically unique and biodiversity rich regions.
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Question 171 Mark
Where are the endemic species concentrated in India?
Answer
North East, North West, Western Ghats and Andman Nicobar islands.
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Question 181 Mark
Give the answer of the following:
If we uncover half of the forest covering of the earth what crisis will be produced at most and at first?
Answer
Population, pollution and ecological imbalance will rise up.
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Question 231 Mark
What is the difference between endemic and exotic species?
Answer
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.
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Question 241 Mark
According to David Tilman, greater the diversity greater is the primary productivity. Can you think of a very low diversity man-made ecosystem that has high productivity.
Answer
Agricultural fields like wheat field or paddy field which are also examples of monoculture practices.
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Question 261 Mark
Name any two sanctuaries in India.
Answer
Keoladeo Ghana bird sanctuary, Bharatpur (Rajasthan) and Periyar sanctuary (Kerala).
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Question 281 Mark
What are biosphere reserves? Mention the importance of setting up of biosphere reserves.
Answer
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.
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Question 301 Mark
Why is genetic variation important in the plant Rauwolfia?
Answer
Genetic variation in Rauwolfia is shown in terms of potency and concentration of the active chemical, reserpine produced by the plant.
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Question 311 Mark
What are threatened species? Name three categories of threatened species.
Answer
Species likely to disappear sooner or later are called threatened species.

Their categories are:

  1. Endangered.
  2. Vulnerable.
  3. Rare.
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Question 321 Mark
How many national parks and wildlife sanctuaries are there in India?
Answer
90 national parks and 448 wildlife sanctuaries are there in India.
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Question 331 Mark
Give the answer of the following:
Which group of vertebrates comprises the highest number of endangered species?
Answer
Mammals.
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Question 341 Mark
Mark the odd one in the following group.
Aravalli Hills, Chanda and Bastar, Khasi Hills, Zoological park.
Answer
Zoological park.
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Question 351 Mark
About 200 species of Cichlid fish became extinct when a particular fish was introduced in lake Victoria of Africa. Name the invasive fish.
Answer
The Nile perch.
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Question 361 Mark
Mark the odd one in the following group.

Seed banks, Tissue culture, Sacred groves, Cryopreservation.

Answer
Sacred groves.
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Question 371 Mark
Apart from conserving individual plants and animals, what else needs to be conserved?
Answer
Viable seeds and gametes.
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Question 381 Mark
What is Red Data Book?
Answer
The Red Data Book is a compilation of data on species threatened with extinction and is maintained by IUCN.
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Question 391 Mark
In the pie chart (A) and (B) drawn below to show the global animal diversity, which group of animals would you name and write on the areas shaded back in (A) and (B). In which kind of habitat would you find these groups of animals?

Answer
A- insects; they are found in almost all types of habitats.
B- Fishes; they are aquatic, both freshwater and sea water.
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Question 411 Mark
Western Ghats have a greater amphibian diversity than the Eastern Ghats. What can be inferred from this statement?
Answer
Western Ghats have high levels of species richness.
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Question 421 Mark
What is mass extinction?
Answer
Due to natural calamities like volcanic eruptions, prolonged drought, heavy rains, earthquakes, asteroid collision, etc., a large number of species become extinct which is called mass extinction.
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Question 431 Mark
Define species diversity and species richness.
Answer
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.
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Question 441 Mark
Mention the two important measures of species diversity in a region.
Answer
Species richness and species evenness are the two measures of species diversity.
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Question 451 Mark
About 200 species of cichlid fish became extint when a particular fish was introduced in lake Victoria of Africa. Name the invasive fish.
Answer
Nile Perch.
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Question 461 Mark
Why have Western Ghats in India been declared as biological hot spots?
Answer
It is because this region has a very high level of species richness and endemism.
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Question 471 Mark
What is meant by threatened species?
Answer
Threatened species are those organisms facing a very high risk of extinction in the wild in the near future.
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Question 481 Mark
Name any two national parks of India.
Answer
Jim Corbett National Park (Uttarakhand) and Kaziranga National Park (Assam).
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Question 491 Mark
What is common about Eichhornia, Lantana and Parthenium with reference to threat to our biodiversity?
Answer
They are exotic species, introduced into India; these alien species have caused environmental damage and posed threat to our native species.
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Question 501 Mark
What is meant by alien species?
Answer
Non-native powerful species which invade a new area are known as alien species.
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