Secondary or high School questions and answers-pscu studies

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Physics

1. Explain why certain drugs become ineffective in curing a disease after many years of use. (Answered)
Explain why certain drugs become ineffective in curing a disease after many years of use. .
Posted On:Wed 9, March 2022 05:10:25 am

2. Give an example of a vestigial structure in human. (Answered)
Give an example of a vestigial structure in human. .
Posted On:Wed 9, March 2022 05:08:40 am

3. What is meant by vestigial structures? (Answered)
What is meant by vestigial structures? .
Posted On:Wed 9, March 2022 05:06:40 am

4. Give a reason why organisms become resistant to drugs. (Answered)
Give a reason why organisms become resistant to drugs. .
Posted On:Wed 9, March 2022 05:04:54 am

5. What is adaptive radiation? (Answered)
What is adaptive radiation? .
Posted On:Wed 9, March 2022 05:02:22 am

6. Explain continental drift as an evidence of evolution. (Answered)
Explain continental drift as an evidence of evolution. .
Posted On:Wed 9, March 2022 05:00:28 am

7. What is meant by? (a) Organic evolution? (b)Continental drift? (Answered)
What is meant by? (a) Organic evolution? (b)Continental drift? .
Posted On:Wed 9, March 2022 04:58:50 am

8. What is meant by the following terms? Give an example in each case. (i) Homologous structures. (ii) Analogous structures. (iii) Vestigial structures. (Answered)
What is meant by the following terms? Give an example in each case. (i) Homologous structures. (ii) Analogous structures. (iii) Vestigial structures. .
Posted On:Wed 9, March 2022 04:56:12 am

9. What is the difference between Darwinian and Lamarckian theories of evolution? (Answered)
What is the difference between Darwinian and Lamarckian theories of evolution? .
Posted On:Wed 9, March 2022 04:51:54 am

10. Distinguish between analogous and homologous structures (Answered)
Distinguish between analogous and homologous structures .
Posted On:Wed 9, March 2022 04:49:17 am

11. State two ways in which Homo sapiens differs from Homo habilis. (Answered)
State two ways in which Homo sapiens differs from Homo habilis. .
Posted On:Wed 9, March 2022 04:47:32 am

12. Distinguish between divergent and convergent evolution giving example in each case. (Answered)
Distinguish between divergent and convergent evolution giving example in each case. .
Posted On:Wed 9, March 2022 04:38:04 am

13. What is organic evolution? (Answered)
What is organic evolution? .
Posted On:Wed 9, March 2022 04:36:30 am

14. Give reason why each of the following is important in the study of evolution: (a) Fossils records. (b) Comparative anatomy. (Answered)
Give reason why each of the following is important in the study of evolution: (a) Fossils records. (b) Comparative anatomy. .
Posted On:Wed 9, March 2022 04:35:18 am

15. State two advantages of natural selection to organisms. (Answered)
State two advantages of natural selection to organisms. .
Posted On:Wed 9, March 2022 04:33:11 am

16. Discuss the various evidences, which show that evolution has taken place. (Answered)
Discuss the various evidences, which show that evolution has taken place. .
Posted On:Wed 9, March 2022 04:32:05 am

17. State three pieces of evidence that support the theory of evolution. (Answered)
State three pieces of evidence that support the theory of evolution. .
Posted On:Wed 9, March 2022 04:29:02 am

18. Give a reason why it is only mutation in genes of gametes that can influence evolution. (Answered)
Give a reason why it is only mutation in genes of gametes that can influence evolution. .
Posted On:Wed 9, March 2022 04:28:00 am

19. Explain why Lamarck’s theory of evolution is not accepted by Biologists today. (Answered)
Explain why Lamarck’s theory of evolution is not accepted by Biologists today. .
Posted On:Wed 9, March 2022 04:26:54 am

20. State two limitations of using a quadrat to estimate the population of organisms. (Answered)
State two limitations of using a quadrat to estimate the population of organisms. .
Posted On:Tue 8, March 2022 15:03:43 pm

21. Explain the importance of protecting the forest ecosystem with reference to the Pollution. (Answered)
Explain the importance of protecting the forest ecosystem with reference to the Pollution. .
Posted On:Tue 8, March 2022 15:02:06 pm

22. Explain the importance of protecting the forest ecosystem with reference to the Water conservation (Answered)
Explain the importance of protecting the forest ecosystem with reference to the Water conservation .
Posted On:Tue 8, March 2022 15:00:05 pm

23. Explain the importance of protecting the forest ecosystem with reference to the Biotechnology. (Answered)
Explain the importance of protecting the forest ecosystem with reference to the Biotechnology. .
Posted On:Tue 8, March 2022 14:57:52 pm

24. Explain the importance of protecting the forest ecosystem with reference to the Biodiversity. (Answered)
Explain the importance of protecting the forest ecosystem with reference to the Biodiversity. .
Posted On:Tue 8, March 2022 14:54:24 pm

25. Explain the importance of protecting the forest ecosystem with reference to the Climate change. (Answered)
Explain the importance of protecting the forest ecosystem with reference to the Climate change. .
Posted On:Tue 8, March 2022 14:51:08 pm

26. Other than using the quadrat, give two methods of estimating population of grass. (Answered)
Other than using the quadrat, give two methods of estimating population of grass. .
Posted On:Tue 8, March 2022 14:48:02 pm

27. State two control measures for malaria. (Answered)
State two control measures for malaria. .
Posted On:Tue 8, March 2022 14:45:53 pm

28. Name the process through which free atmospheric nitrogen is converted into nitrates. (Answered)
Name the process through which free atmospheric nitrogen is converted into nitrates. .
Posted On:Tue 8, March 2022 14:42:52 pm

29. The diagram below represents a certain plant. (a) What is the likely habitat for the plant? (b) Give two reasons for your answer in (a) above. (Answered)
The diagram below represents a certain plant. (a) What is the likely habitat for the plant? (b) Give two reasons for your answer in (a) above. .
Posted On:Tue 8, March 2022 14:38:08 pm

30. What is meant by the term Carrying capacity? (Answered)
What is meant by the term Carrying capacity? .
Posted On:Tue 8, March 2022 14:35:02 pm

31. What is meant by the term Ecosystem ? (Answered)
What is meant by the term Ecosystem ? .
Posted On:Tue 8, March 2022 14:32:03 pm

32. What is meant by the term Habitat? (Answered)
What is meant by the term Habitat? .
Posted On:Tue 8, March 2022 14:30:34 pm

33. The diagram below shows a transverse section of a leaf. a)Name the habitat of the plant from which the leaf is obtained. (b) Give two reasons for your answer in (a) above. (Answered)
The diagram below shows a transverse section of a leaf. a)Name the habitat of the plant from which the leaf is obtained. (b) Give two reasons for your answer in (a) above. .
Posted On:Tue 8, March 2022 14:28:32 pm

34. Name a substance that is responsible for acid rain. (Answered)
Name a substance that is responsible for acid rain. .
Posted On:Tue 8, March 2022 14:17:47 pm

35. What is eutrophication? (Answered)
What is eutrophication? .
Posted On:Tue 8, March 2022 14:16:46 pm

36. Give an example of biological control. (Answered)
Give an example of biological control. .
Posted On:Tue 8, March 2022 14:12:05 pm

37. What is meant by the term biological control? (Answered)
What is meant by the term biological control? .
Posted On:Tue 8, March 2022 14:10:43 pm

38. State two ways in which aerenchyma tissues in aquatic plants are adapted to their function. (Answered)
State two ways in which aerenchyma tissues in aquatic plants are adapted to their function. .
Posted On:Tue 8, March 2022 14:09:18 pm

39. Other than using the quadrant, give two methods of estimating population of grass. (Answered)
Other than using the quadrant, give two methods of estimating population of grass. .
Posted On:Tue 8, March 2022 14:06:11 pm

40. Name one process that is responsible for loss of energy from one trophic level to the next. (Answered)
Name one process that is responsible for loss of energy from one trophic level to the next. .
Posted On:Tue 8, March 2022 14:04:55 pm

41. State three effects of dumping untreated sewage into a river. (Answered)
State three effects of dumping untreated sewage into a river. .
Posted On:Tue 8, March 2022 14:03:13 pm

42. Name the disease in humans caused by plasmodium falciparum. (Answered)
Name the disease in humans caused by plasmodium falciparum. .
Posted On:Tue 8, March 2022 14:01:24 pm

43. Name the causative agents of the following diseases in humans. (i) Typhoid. (ii) Amoebic dysentery. (Answered)
Name the causative agents of the following diseases in humans. (i) Typhoid. (ii) Amoebic dysentery. .
Posted On:Tue 8, March 2022 14:00:15 pm

44. Name two benefits that a parasite derives from the host. (Answered)
Name two benefits that a parasite derives from the host. .
Posted On:Tue 8, March 2022 13:57:59 pm

45. Describe the nitrogen cycle. (Answered)
Describe the nitrogen cycle. .
Posted On:Tue 8, March 2022 13:56:38 pm

46. Describe how different parts of the cell organelles are adapted to their functions (Answered)
Describe how different parts of the cell organelles are adapted to their functions .
Posted On:Tue 8, March 2022 13:52:22 pm

47. State two characteristic of aerenchyma tissue. (Answered)
State two characteristic of aerenchyma tissue. .
Posted On:Tue 8, March 2022 13:51:21 pm

48. Describe the three characteristics of a population. (Answered)
Describe the three characteristics of a population. .
Posted On:Tue 8, March 2022 13:49:07 pm

49. Describe causes and methods of controlling water pollution (Answered)
Describe causes and methods of controlling water pollution .
Posted On:Tue 8, March 2022 13:18:05 pm

50. State one way by which HIV/AIDS is transmitted from mother to child. (Answered)
State one way by which HIV/AIDS is transmitted from mother to child. .
Posted On:Tue 8, March 2022 13:09:57 pm

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