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Fundamentals of Physical Geography - Class 11
GeographyClass 11

Fundamentals of Physical Geography

Physical geography fundamentals

Previous Year Questions

Practice questions from Geography Fundamentals of Physical Geography

1

Biological Oxygen Demand (BOD) is a standard criterion for

A. Measuring oxygen levels in blood
B. Computing oxygen levels in forest ecosystems
C. Pollution assay in aquatic ecosystems(Correct Answer)
D. Assessing oxygen levels in high altitude regions

Biological oxygen demand (BOD) is the amount of dissolved oxygen needed (i.e., demanded) by aerobic microorganisms to break down organic material present in a given water sample. A highly polluted water will have a high levels of biological oxygen demand (BOD).

Source: NCERT: 12th Biology Chapter

2

Consider the following rivers:

  1. Vamsadhara
  2. Indravati
  3. Pranahita
  4. Pennar

Which of the above are tributaries of Godavari?

A. 1, 2 and 3
B. 2, 3 and 4
C. 1, 2 and 4
D. 2 and 3 only(Correct Answer)

The Godavari River has several principal tributaries, including the Penganga, Indravati, Pranahita, and Manjra. Among the rivers listed in the question, Indravati and Pranahita are tributaries of the Godavari. Therefore, the correct answer is option (d) 2 and 3 only.

Source: NCERT: Class 12 India Physical Environment

3

Which of the following have species that can establish symbiotic relationship with other organisms?

  1. Cnidarians
  2. Fungi
  3. Protozoa

Select the correct answer using the code given below.

A. 1 and 2 only
B. 2 and 3 only
C. 1 and 3 only
D. 1, 2 and 3(Correct Answer)

Cnidarians, also called coelenterate, are mostly marine animals. They include the corals, hydras, jellyfish, Portuguese men-of-war, sea anemones, sea pens, sea whips, and sea fans. The relationship between cnidarians and dinoflagellate algae is termed as symbiotic, because both the animal host and the algae are benefiting from the association. It is a mutualistic interaction.

Fungi have several mutualistic relationships with other organisms. In mutualism, both organisms benefit from the relationship. Two common mutualistic relationships involving fungi are mycorrhiza and lichen.

Termites have a mutualistic relationship with protozoa that live in the insect's gut. The termite benefits from the ability of bacterial symbionts within the protozoa to digest cellulose. Hence option (d) is the correct answer.

Source Attribution: Chapter 2 Biological Classification, Chapter 4 Animal Kingdom, NCERT: Class XI Biology

4

Consider the following fauna and India:

  1. Gharial
  2. Leatherback turtle
  3. Swamp deer

Which of the above is/are endangered?

A. 1 and 2 only
B. 3 only
C. 1, 2 and 3(Correct Answer)
D. None

All three species mentioned in the question are endangered in India. The Gharial, Leatherback turtle, and Swamp deer face various threats that have led to their endangered status. As there is no specific list such as IUCN provided in the question, option C, which includes all three species, is correct.

Source Attribution:

  • NCERT: Ecology
5

The most important fishing grounds of the world are found in the regions where

A. Warm and cold atmospheric currents meet
B. Rivers drain out large amounts of freshwater into the sea
C. Warm and cold oceanic currents meet(Correct Answer)
D. Continental shelf is undulating

Planktons are abundant where warm and cold currents meet. That make these areas important fishing grounds of the world.

Source: 12th NCERT: Unit 9 Ecology and Environment

Previous Year Questions

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1

Biological Oxygen Demand (BOD) is a standard criterion for

Topic: Environmental PollutionYear: 2017

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