Animal Growth and Development MCQS

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1. What is growth in animals?
(A) Increase in body weight and size
(B) Increase in body size only
(C) Increase in body weight only
(D) Increase in body length only

2. Which of the following is a primary factor influencing animal growth?
(A) Genetics
(B) Environmental temperature
(C) Feeding frequency
(D) Sleep duration

3. What is the term for the period of rapid growth and development in animals?
(A) Growth spurt
(B) Senescence
(C) Puberty
(D) Maturation

4. What is the primary source of energy for growth in animals?
(A) Proteins
(B) Fats
(C) Minerals
(D) Carbohydrates

5. Which hormone is commonly associated with regulation of growth in animals?
(A) Estrogen
(B) Insulin
(C) Growth hormone
(D) Testosterone

6. What is the role of growth factors in animal development?
(A) Regulate body temperature
(B) Aid digestion
(C) Control sleep patterns
(D) Stimulate cell division and tissue growth

7. What process increases cell number during growth?
(A) Mitosis
(B) Meiosis
(C) Apoptosis
(D) Differentiation

8. What is a characteristic of hyperplasia?
(A) Increase in cell size
(B) Decrease in cell number
(C) Decrease in cell size
(D) Increase in cell number

9. What is the specialization of cells called?
(A) Hyperplasia
(B) Hypertrophy
(C) Senescence
(D) Differentiation

10. Which is an intrinsic factor influencing growth?
(A) Genetics
(B) Temperature
(C) Nutrition
(D) Social interaction

11. Why is adequate nutrition important during growth periods?
(A) It accelerates growth excessively
(B) It prevents growth
(C) It ensures proper development and prevents abnormalities
(D) It causes hyperplasia

12. What is the period of reproductive maturity called?
(A) Puberty
(B) Senescence
(C) Maturation
(D) Fertilization

13. What is a characteristic of hypertrophy?
(A) Increase in cell number
(B) Decrease in cell size
(C) Increase in cell size
(D) Decrease in cell number

14. What is the role of growth plates in bones?
(A) Allow longitudinal bone growth
(B) Regulate sleep
(C) Promote muscle growth
(D) Control heart rate

15. How do genetics affect growth potential?
(A) Interact with environment to influence growth
(B) Independent of nutrition
(C) No influence
(D) Sole determinant of growth

16. How do temperature and humidity affect growth?
(A) No impact
(B) Affect metabolism and nutrient use
(C) Stimulate cell division directly
(D) Cause hyperplasia

17. What is the role of IGF-1?
(A) Regulate temperature
(B) Aid digestion
(C) Control sleep
(D) Stimulate cell growth and division

18. Why are growth curves important?
(A) Determine sleep cycles
(B) Predict puberty only
(C) Regulate temperature
(D) Show growth rates over time

19. What defines anabolic processes?
(A) Breakdown of molecules
(B) Buildup of complex molecules
(C) Cell shrinkage
(D) Cell loss

20. How does nutrient availability affect growth?
(A) Deficiency accelerates growth
(B) Excess inhibits growth
(C) Balanced intake supports proper growth
(D) No effect

21. What is the role of growth hormone?
(A) Control sleep
(B) Stimulate tissue growth and development
(C) Regulate temperature
(D) Aid digestion

22. How does exercise affect growth?
(A) Inhibits growth
(B) Promotes bone and muscle development
(C) Accelerates all growth
(D) No impact

23. What is programmed cell death called?
(A) Apoptosis
(B) Mitosis
(C) Meiosis
(D) Hyperplasia

24. Which is a growth disorder?
(A) Gigantism
(B) Hyperactivity
(C) Hypothermia
(D) Hypoglycemia

25. What do thyroid hormones do?
(A) Control sleep
(B) Stimulate metabolism and growth
(C) Regulate temperature only
(D) Aid digestion

26. How do growth rates differ among species?
(A) Same in all species
(B) Larger species grow slower
(C) Smaller species grow slower
(D) Only genetics matter

27. What is the role of GHRH?
(A) Inhibits growth
(B) Controls temperature
(C) Regulates sleep
(D) Stimulates GH release

28. What is ossification?
(A) Conversion of cartilage to bone
(B) Sleep regulation
(C) Muscle formation
(D) Heart regulation

29. Why is rest important for growth?
(A) Accelerates growth
(B) Builds muscles only
(C) Allows tissue repair and growth
(D) Inhibits growth

30. What is the role of GH receptors?
(A) Regulate sleep
(B) Control temperature
(C) Initiate cellular growth responses
(D) Aid digestion

31. How does cell differentiation aid development?
(A) Regulates sleep
(B) Controls temperature
(C) Promotes mitosis only
(D) Leads to specialized cell types

32. What is the role of insulin in growth?
(A) Regulate temperature
(B) Promote glucose uptake and growth
(C) Control sleep
(D) Aid digestion

33. How does environmental stress affect growth?
(A) Accelerates growth
(B) Inhibits growth and causes health issues
(C) Builds muscle
(D) No impact

34. What is the function of auxins?
(A) Control ripening
(B) Promote root growth
(C) Regulate flowering
(D) Stimulate plant growth

35. What is cell migration?
(A) Cell enlargement
(B) Movement of cells to specific locations
(C) Increase in cell number
(D) Cell specialization

36. How does early nutrition affect growth later in life?
(A) No impact
(B) Only short-term effect
(C) Supports optimal long-term growth
(D) Causes rapid growth

37. What is the role of EGF?
(A) Promote cell proliferation and regeneration
(B) Control sleep
(C) Regulate temperature
(D) Aid digestion

38. How do sex hormones affect growth?
(A) No effect
(B) Testosterone and estrogen influence growth differently
(C) Only testosterone works
(D) Only estrogen works

39. What is the role of apoptosis?
(A) Regulate sleep
(B) Remove unwanted or damaged cells
(C) Control temperature
(D) Promote mitosis

40. How do toxins affect growth?
(A) Inhibit growth and cause abnormalities
(B) Accelerate growth
(C) No impact
(D) Promote migration

41. Why is cell-cell communication important?
(A) Coordinates growth and responses
(B) Controls temperature
(C) Regulates sleep
(D) Inhibits division

42. What is myogenesis?
(A) Bone growth
(B) Formation of muscle fibers
(C) Sleep regulation
(D) Heart control

43. What is the role of extracellular matrix?
(A) Provide support and growth signals
(B) Control temperature
(C) Regulate sleep
(D) Speed migration

44. How does FGF aid regeneration?
(A) Regulate sleep
(B) Control temperature
(C) Inhibit division
(D) Promote tissue healing and proliferation

45. What is the endocrine system’s role?
(A) Regulate sleep
(B) Release hormones influencing growth and metabolism
(C) Control temperature
(D) Promote migration

46. How do genes affect growth?
(A) No impact
(B) Inhibit division
(C) Determine potential and environmental responses
(D) Promote migration

47. What is the function of homeobox genes?
(A) Regulate sleep
(B) Control temperature
(C) Control body structure development
(D) Promote division

48. What is metamorphosis?
(A) Rapid growth
(B) Major change in body form and function
(C) Muscle formation
(D) Growth inhibition

49. What does GHRH do?
(A) Regulate sleep
(B) Stimulate GH release
(C) Control temperature
(D) Promote migration

50. How does the nervous system influence growth?
(A) Regulate sleep
(B) Control temperature
(C) Coordinate responses affecting growth
(D) Inhibit division

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