Q1. Reproductive processes give rise to new individuals that are
A. Completely identical
B. Completely different
C. Similar but subtly different
D. Unrelated
ANSWER: Similar but subtly different
Q2. Variation is produced during
A. Only sexual reproduction
B. Only asexual reproduction
C. Both asexual and sexual reproduction
D. Only growth
ANSWER: Both asexual and sexual reproduction
Q3. Sexual reproduction maximises the number of
A. Identical traits
B. Successful variations
C. Body designs
D. Chromosomes
ANSWER: Successful variations
Q4. Paddy plants show very little variation because they
A. Are animals
B. Reproduce sexually
C. Reproduce asexually
D. Live in water
ANSWER: Reproduce asexually
Q5. Large visible variations are commonly seen in
A. Paddy plants
B. Bacteria
C. Animals and human beings
D. Algae
ANSWER: Animals and human beings
Q6. The study of how variations are created and inherited is called
A. Ecology
B. Evolution
C. Genetics
D. Taxonomy
ANSWER: Genetics
Q7. Long-term accumulation of variations is studied under
A. Growth
B. Reproduction
C. Evolution
D. Nutrition
ANSWER: Evolution
Q8. Inheritance provides the next generation with
A. Only variations
B. Only differences
C. Basic body design and subtle changes
D. Completely new designs
ANSWER: Basic body design and subtle changes
Q9. The second generation inherits
A. Only new variations
B. Only parental traits
C. Inherited and newly created variations
D. No variations
ANSWER: Inherited and newly created variations
Q10. In asexual reproduction, repeated division of one bacterium produces individuals that are
A. Very different
B. Completely identical
C. Very similar
D. Unrelated
ANSWER: Very similar
Q11. Minor differences in asexual reproduction arise due to
A. Fertilisation
B. Environmental changes
C. Inaccuracies in DNA copying
D. Mutation only
ANSWER: Inaccuracies in DNA copying
Q12. Sexual reproduction produces greater diversity because
A. DNA is copied perfectly
B. Two individuals are involved
C. Only one parent contributes DNA
D. Cell division is faster
ANSWER: Two individuals are involved
Q13. In sexual reproduction, each generation shows
A. No inheritance
B. Only parental traits
C. New combinations of traits
D. Loss of variation
ANSWER: New combinations of traits
Q14. Variations do not have equal chances of survival because
A. All environments are same
B. All traits are harmful
C. Environment selects useful variations
D. DNA stops copying
ANSWER: Environment selects useful variations
Q15. Bacteria resistant to heat survive better during
A. Floods
B. Cold waves
C. Heat waves
D. Droughts
ANSWER: Heat waves
Q16. Selection of variants by environment forms the basis of
A. Reproduction
B. Heredity
C. Evolution
D. Growth
ANSWER: Evolution
Q17. If trait B exists in 60% of a population, it is likely to have
A. Appeared recently
B. Appeared earlier
C. No advantage
D. No inheritance
ANSWER: Appeared earlier
Q18. Creation of variations promotes survival because
A. All individuals become identical
B. Environment remains constant
C. Some individuals become better adapted
D. DNA stops changing
ANSWER: Some individuals become better adapted
Q19. Heredity mainly deals with
A. Body growth
B. Transmission of traits
C. Nutrition
D. Respiration
ANSWER: Transmission of traits
Q20. The most obvious outcome of reproduction is
A. Variation only
B. Death
C. Individuals of similar design
D. Mutation
ANSWER: Individuals of similar design
Q21. Rules of heredity explain how traits are
A. Destroyed
B. Randomly formed
C. Reliably inherited
D. Removed
ANSWER: Reliably inherited
Q22. Children resemble parents because
A. They eat similar food
B. They live together
C. They inherit traits
D. They grow similarly
ANSWER: They inherit traits
Q23. Human populations show large variation because
A. Growth is uneven
B. Reproduction is sexual
C. DNA is unstable
D. Environment is fixed
ANSWER: Reproduction is sexual
Q24. Earlobes in humans occur mainly in
A. One form only
B. Three forms
C. Two variants
D. Many shapes
ANSWER: Two variants
Q25. Free and attached earlobes are examples of
A. Acquired traits
B. Inherited traits
C. Diseases
D. Mutations only
ANSWER: Inherited traits
Q26. The lowest part of the ear is called the
A. Pinna
B. Cochlea
C. Earlobe
D. Canal
ANSWER: Earlobe
Q27. In inheritance, both parents contribute
A. Unequal genetic material
B. Equal genetic material
C. Only physical traits
D. Only chromosomes
ANSWER: Equal genetic material
Q28. Each trait in a child has
A. One version
B. No versions
C. Two versions
D. Many versions
ANSWER: Two versions
Q29. Traits in a child are influenced by
A. Only mother’s DNA
B. Only father’s DNA
C. Both maternal and paternal DNA
D. Environment only
ANSWER: Both maternal and paternal DNA
Q30. The scientist who proposed rules of inheritance was
A. Darwin
B. Lamarck
C. Mendel
D. Watson
ANSWER: Mendel
Q31. Mendel’s experiments were conducted more than
A. 50 years ago
B. 75 years ago
C. 100 years ago
D. 150 years ago
ANSWER: 100 years ago
Q32. The rules of inheritance help explain
A. Growth rate
B. Body size
C. Trait expression
D. Nutrition
ANSWER: Trait expression
Q33. Two individuals of the same species differ mainly due to
A. Habitat
B. Acquired habits
C. Genetic variations
D. Food intake
ANSWER: Genetic variations
Q34. Accumulation of variations occurs over
A. One generation
B. Two generations
C. Many generations
D. One lifetime
ANSWER: Many generations
Q35. In asexual reproduction, diversity generation is
A. Very high
B. Moderate
C. Very low
D. Absent
ANSWER: Very low
Q36. Sexual reproduction increases diversity by
A. Reducing DNA
B. Combining variations
C. Eliminating mutations
D. Preventing inheritance
ANSWER: Combining variations
Q37. Variations that are harmful are usually
A. Preserved
B. Selected
C. Eliminated
D. Inherited always
ANSWER: Eliminated
Q38. Useful variations are
A. Destroyed
B. Selected by environment
C. Ignored
D. Not inherited
ANSWER: Selected by environment
Q39. Variation is essential for
A. Individual survival only
B. Growth only
C. Species survival
D. Digestion
ANSWER: Species survival
Q40. Greater diversity gives organisms
A. Uniformity
B. More chances of survival
C. Less stability
D. No advantage
ANSWER: More chances of survival
Q41. Differences inherited from parents are called
A. Acquired traits
B. Learned traits
C. Inherited traits
D. Temporary traits
ANSWER: Inherited traits
Q42. The study of inheritance patterns is central to
A. Ecology
B. Genetics
C. Geography
D. Anatomy
ANSWER: Genetics
Q43. In sexual reproduction, each individual is
A. Genetically identical
B. Genetically unique
C. Unchanged
D. Sterile
ANSWER: Genetically unique
Q44. Minor DNA copying errors are a source of
A. Death only
B. No effect
C. Variation
D. Disease only
ANSWER: Variation
Q45. Accumulated variations over time lead to
A. Stability only
B. Evolution
C. Extinction only
D. No change
ANSWER: Evolution
Q46. Heredity ensures continuity of
A. Environment
B. Traits
C. Nutrition
D. Energy
ANSWER: Traits
Q47. A trait seen in many individuals is likely to be
A. Recently formed
B. Harmful
C. Older in origin
D. Non-heritable
ANSWER: Older in origin
Q48. Sexual reproduction is more effective in generating variation because
A. DNA copying is inaccurate
B. Two DNA sets combine
C. Cells divide faster
D. Growth is rapid
ANSWER: Two DNA sets combine
Q49. The main difference between sexual and asexual reproduction is
A. Growth rate
B. Number of parents involved
C. Body size
D. Nutrition
ANSWER: Number of parents involved
Q50. Genetics helps us understand
A. Only body growth
B. Only diseases
C. Similarities and differences among individuals
D. Nutrition patterns
ANSWER: Similarities and differences among individuals