Start learning →

DSSSB TGT Biodiversity — practice questions

Explore 3 free Biodiversity questions in DSSSB TGT Biology. Open each question or exercise to read its content, reference answers and available explanation.

Practise Biodiversity with Quill →

Biodiversity questions and exercises with answers

Showing questions 1–3 of 3.

The variety of living organisms — from microscopic algae to giant trees, on land and in oceans — is called:Read the answer and worked solution →The process of grouping organisms into categories based on shared characteristics is called:Read the answer and worked solution →Microscopic algae in the oceans contribute to life on Earth by:Read the answer and worked solution →

Worked practice questions

The variety of living organisms — from microscopic algae to giant trees, on land and in oceans — is called:

  1. Climate
  2. Habitat
  3. Biodiversity
  4. Ecosystem
Show answer and solution

Correct answer: C. Biodiversity

Biodiversity = biological diversity. It refers to all life forms on Earth at every scale — species variety, genetic variety within species, and ecosystem variety. Biodiversity is essential for the functioning of ecosystems and the well-being of humans.

Open this question →

The process of grouping organisms into categories based on shared characteristics is called:

  1. Adaptation
  2. Domestication
  3. Extinction
  4. Classification
Show answer and solution

Correct answer: D. Classification

Classification is the systematic grouping of organisms based on shared features (anatomical, physiological, genetic, evolutionary). It allows scientists to organise the millions of known species into a meaningful hierarchy and to study relationships between them.

Open this question →

Microscopic algae in the oceans contribute to life on Earth by:

  1. Eating other organisms
  2. Forming clouds
  3. Releasing most of the oxygen we breathe
  4. Releasing toxic gases
Show answer and solution

Correct answer: C. Releasing most of the oxygen we breathe

Marine phytoplankton (microscopic algae) produce roughly 50-80% of the oxygen on Earth through photosynthesis. So the oxygen in EVERY breath you take comes more from the ocean's microbes than from forests. They are the foundation of the marine food chain and key climate regulators.

Open this question →

How to practise

  1. Choose a Biodiversity question and try to work out your answer.
  2. Open the question to check the correct answer and read its worked solution.
  3. Continue in the app for bite-sized lessons, explanations and review with Quill. You can start without creating an account.

More Biology topics

Life ProcessesScienceControl and CoordinationHeredityCellHeredity and EvolutionCell And Its OrganisationC9organelles