Important Practice Questions and Answers in Biology Part 9

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Direction (Q. 26 to Q. 30) : Read the statement-1 and statement-2 carefully to mark the correct option out of the options given below.

(a) If both the statement-1 and the statement-2 are true and the statement-2 is a correct explanation of the statement-1.

(b) If both the statement-1 and statement-2 are true but the statement-2 is not a correct explanation of the statement-1.

(c) If the statement-1 is true but the statement-2 are false.

(d) If both the statement-1 and statement-2 are false.

(e) It the statement-1 is false but statement-2 is true.

6. statement-1: Amoeba shows multiple fission during unfavourable conditions.

Statement-2: Chances of survival are less during unfavourable conditions.

(a) If both the statement-1 and the statement-2 are true and the statement-2 is a correct explanation of the statement-1.

(b) If both the statement-1 and statement-2 are true but the statement-2 is not a correct explanation of the statement-1.

(c) If the statement-1 is true but the statement-2 are false.

(d) If both the statement-1 and statement-2 are false.

(e) It the statement-1 is false but statement-2 is true.

Answer: (c)

7. statement-1: Asexual reproduction is also called blastogenesis.

Statement-2: In asexual reproduction, there is no formation and fission of gametes.

(a) If both the statement-1 and the statement-2 are true and the statement-2 is a correct explanation of the statement-1.

(b) If both the statement-1 and statement-2 are true but the statement-2 is not a correct explanation of the statement-1.

(c) If the statement-1 is true but the statement-2 are false.

(d) If both the statement-1 and statement-2 are false.

(e) It the statement-1 is false but statement-2 is true.

Answer: (b)

8. statement-1: Individuals produced by asexual reproduction are genetically similar to parents.

Statement-2: Asexual reproduction involves only mitotic divisions.

(a) If both the statement-1 and the statement-2 are true and the statement-2 is a correct explanation of the statement-1.

(b) If both the statement-1 and statement-2 are true but the statement-2 is not a correct explanation of the statement-1.

(c) If the statement-1 is true but the statement-2 are false.

(d) If both the statement-1 and statement-2 are false.

(e) It the statement-1 is false but statement-2 is true.

Answer: (b)

9. statement-1: In honey bee, life history shows natural and complete parthenogenesis.

Statement-2: In honey bee, both drones and workers are parthenogenetically developed.

(a) If both the statement-1 and the statement-2 are true and the statement-2 is a correct explanation of the statement-1.

(b) If both the statement-1 and statement-2 are true but the statement-2 is not a correct explanation of the statement-1.

(c) If the statement-1 is true but the statement-2 are false.

(d) If both the statement-1 and statement-2 are false.

(e) It the statement-1 is false but statement-2 is true.

Answer: (c)

Evolution

1. Which of the following was most likely to have been absent in free from in the primordial atmosphere at the time of origin of life?

(a)

(b)

(c)

(d)

Answer: (a)

2. Which one of the following is the correct sequence of chemical substance produced during the origin of life on the earth?

(a) Water, amino acid, nucleic acid and enzyme

(b) Glucose, amino acid, nucleic acid and protein

(c) Amino acid, ammonium phosphate and nucleic acid

(d) Ammonia, amino acid, protein and nucleic acid

Answer: (a)

3. Which of the following sequence is found in Rous sarcoma virus?

(a) DNA RNA Protein

(b) RNA RNA Protein

(c) RNA DNA RNA Protein

(d) DNA DNA Protein

Answer: (c)