Bihar Board Class 11 Science Biology · Ch 1: The Living World

Topics in this test

Difficulty: 3 easy · 9 medium · 18 hard

Sample questions with answers

The first 5 questions of this free test.

1. Q1. The number of described species is said to be about 1.7–1.8 million, and this huge variety is called biodiversity. Which conclusion does the chapter draw from this fact?

   • A. Local common names are enough to study all organisms
   • B. Classification is unnecessary because species are too few
   • C. Only plants need to be named and classified
   • D. Standardised scientific naming and classification become essential
   Solution

   Because of the enormous number and variety of organisms, scientists need a standard system of naming and classification to study them.

2. Q2. Odd one out: three of the following are listed in the chapter as taxonomical aids for the study and identification of organisms, while one is not. Pick the odd one.

   • A. Zoological park
   • B. Metabolism
   • C. Herbarium
   • D. Botanical garden
   Solution

   Herbaria, botanical gardens and zoological parks are taxonomical aids, whereas metabolism is a defining feature of life, not a tool for identifying organisms.

3. Q3. Match the pair: (1) ICBN (2) ICZN (3) Systema Naturae (4) Binomial name. Options: (p) Linnaeus's work (q) rules for plants (r) genus + specific epithet (s) rules for animals.

   • A. 1-p, 2-s, 3-q, 4-r
   • B. 1-q, 2-s, 3-r, 4-p
   • C. 1-q, 2-s, 3-p, 4-r
   • D. 1-s, 2-q, 3-p, 4-r
   Solution

   ICBN gives rules for naming plants and ICZN for animals; Systema Naturae was Linnaeus's work, and a binomial name is made of genus plus specific epithet.

4. Q4. Assertion (A): Consciousness is considered the defining property of living organisms. Reason (R): All living organisms at the cellular level are capable of sensing their surroundings and responding to stimuli. Choose the correct option.

   • A. A is false but R is true
   • B. Both A and R are true and R is the correct explanation of A
   • C. Both A and R are true but R is not the correct explanation of A
   • D. A is true but R is false
   Solution

   Both statements are true and the ability to sense and respond to stimuli at the cellular level is exactly why consciousness is treated as the defining property, so R correctly explains A.

5. Q5. Consider the statements: (i) Metabolic reactions can be carried out outside the body in a cell-free system in a test tube. (ii) Such isolated reactions in a test tube are living. Which is correct?

   • A. Both (i) and (ii) are correct
   • B. Only (ii) is correct
   • C. Only (i) is correct
   • D. Neither (i) nor (ii) is correct
   Solution

   Metabolism can be demonstrated in a cell-free system, but such isolated reactions are neither living nor non-living, so statement (ii) is wrong.

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