Form 4 Biology Questions and Answers

Form 4 biology questions and answers

Form 4 Biology Questions and Answers

1. What are the two main types of growth?

Answer: The two main types of growth are physical growth and biological growth.

2. What is physical growth?

Answer: Physical growth refers to an increase in size, such as an increase in height, width, or length.

3. What is biological growth?

Answer:  Biological growth refers to an increase in the number of cells, tissues, or organisms, such as cell division or reproduction.

4. What are some factors that influence growth in plants?

Answer:  Some factors that influence growth in plants are light, temperature, water, nutrients, and air.

5.  What is genetics?

Answer: Genetics is the study of how traits are passed down from parents to offspring.

6. What are genes?

Answer: Genes are segments of DNA that contain instructions for building proteins.

7. What is DNA?

Answer: DNA (Deoxyribonucleic acid) is the genetic material that contains an organism’s hereditary information.

8. What are alleles?

Answer: Alleles are alternative versions of the same gene.

9. What is dominant and recessive?

Answer: Dominant refers to a gene that expresses its trait over a recessive gene. Recessive refers to a gene that is masked by a dominant gene.

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10. What is a phenotype?

Answer: A phenotype is the observable physical and behavioral characteristics of an organism.

11. What is a mutation?

Answer: A mutation is a change in the DNA sequence that can result in a different trait.

12. What is genetic variation?

Answer: Genetic variation refers to the differences in genetic material within a population.

13. What is heredity?

Answer: Heredity is the passing of traits from parents to offspring through genes.

14. What is a chromosome?

Answer: A chromosome is a structure in a cell that contains genetic material.

15. What is meiosis?

Answer: Meiosis is a type of cell division that results in the production of gametes with half the number of chromosomes as the original cell.

16. What is a homozygous dominant?

Answer: Homozygous dominant refers to an organism with two copies of the same dominant allele.

17. What is a homozygous recessive?

Answer: Homozygous recessive refers to an organism with two copies of the same recessive allele.

18. What is a heterozygous?

Answer: Heterozygous refers to an organism with two different alleles for a particular gene.

19. What is a cross?

Answer: A cross is a breeding experiment to determine the inheritance of traits.

20. What is a hybrid?

Answer: A hybrid is an offspring produced from parents of different varieties or species.

21. What is a pedigreed animal?

Answer: A pedigreed animal is one with a known lineage or family history.

22. What is cloning?

Answer: Cloning is the process of creating an exact genetic copy of an organism or a part of an organism.

23. What is growth hormone?

Answer: Growth hormone (GH) is a hormone produced by the pituitary gland that regulates growth and metabolism in humans and animals.

24. Who proposed the modern system of classification?

Answer: Carl Linnaeus.

25.  What are the seven taxonomic categories from largest to smallest?

Answer: Kingdom, Phylum, Class, Order, Family, Genus, Species.

26. What is the purpose of classification?

Answer: Classification helps to organize and understand the diversity of life.

27. What are the two main types of classification?

Answer: Phylogenetic (evolutionary) and taxonomic (morphological).

28. What is the definition of a species?

Answer: A species is a group of living organisms that can interbreed to produce fertile offspring.

29. What is the difference between a genus and a species?

Answer: A genus is a group of related species, while a species is a group of living organisms that can interbreed.

30. What are the three domains of life?

Answer: Bacteria, Archaea, Eukarya.

31. What are the five kingdoms of classification?

Answer: Monera, Protista, Fungi, Plantae, Animalia.

32. What is binomial nomenclature?

Answer: Binomial nomenclature is a system of naming species using two Latin words, the genus and species.

33. What is the scientific name of humans?

Answer: Homo sapiens.

34. What is a taxon?

Answer: A taxon is a group of organisms at any taxonomic rank, such as species, genus, or family.

35. What is the difference between a taxonomist and a taxon?

Answer: A taxonomist is a scientist who studies and classifies living organisms, while a taxon is a group of organisms at any taxonomic rank.

36. What is cladistics?

Answer: Cladistics is a method of classification based on evolutionary relationships, using cladograms to represent evolutionary branching.

37. What is a phylogenetic tree?

Answer: A phylogenetic tree is a diagram showing evolutionary relationships among species.

38. hat is an ancestral species?

Answer: An ancestral species is an extinct species from which other species have evolved.

39. What is a clade?

Answer: A clade is a group of organisms that share a common ancestor.

40. What is a morphological characteristic?

Answer: A morphological characteristic is a physical or structural feature of an organism.

42. What is the difference between homology and analogy?

Answer: Homology is similarity due to common ancestry, while analogy is similarity due to convergent evolution.

43. What is the difference between taxonomy and systematics?

Answer: Taxonomy is the study of classification, while systematics is the study of the diversity and relationships of organisms.

44. Form 4 Biology – Evolution Questions and Answers

What is evolution?

Answer: Evolution is the process of change in all forms of life over generations, including genetic variation, adaptation, and speciation.

45. What is the theory of evolution?

Answer: The theory of evolution is the scientific explanation for how species change over time through natural selection.

46. hat is natural selection?

Answer: Natural selection is a process in which organisms with advantageous traits are more likely to survive and reproduce, passing on their traits to their offspring.

47. Who proposed the theory of evolution?

Answer: The theory of evolution was proposed by British naturalist Charles Darwin and Alfred Russel Wallace in 1859.

48. What is adaptation?

Answer: Adaptation is a characteristic of an organism that helps it to survive and reproduce in its environment.

49. What is speciation?

Answer: Speciation is the process of forming new species from existing ones through changes in genetic variation and adaptation.

50. What is genetic variation?

Answer: Genetic variation refers to differences in genetic material within a species.

51. What is artificial selection?

Answer:  Artificial selection is the process of selective breeding in which humans choose organisms with desired traits to breed and produce offspring with those traits.

52. What is the difference between microevolution and macroevolution?

Answer: Microevolution refers to small-scale changes in populations over time, while macroevolution refers to large-scale changes that result in the formation of new species.

54. What is the fossil record?

Answer: The fossil record is a collection of fossils and other evidence of ancient life that provides evidence for evolution.

55. What is the evidence for evolution?

Answer: Evidence for evolution includes the fossil record, comparative anatomy, comparative embryology, and molecular biology.

56. What is comparative anatomy?

Answer: Comparative anatomy is the study of the similarities and differences in the anatomy of different species, used to support the theory of evolution.

57. What is comparative embryology?

Answer: Comparative embryology is the study of the similarities and differences in the development of embryos in different species, used to support the theory of evolution.

58. What is molecular biology?

Answer: Molecular biology is the study of the molecular basis of biological processes, including the genetic basis of evolution.

59. What is the role of mutation in evolution?

Answer: Mutations are changes in genetic material that can lead to new traits and adaptations, playing a crucial role in evolution.

60. Explain the character of gene flow in evolution.

Answer: Gene flow refers to the exchange of genetic material between populations, influencing the evolution of species.

61. State the character of genetic drift in evolution?

Answer: Genetic drift is a random process in which certain genetic variations become more or less common over time, affecting the evolution of a population.

62. What is the role of non-random mating in evolution?

Answer: Non-random mating is the selective process of choosing mates based on specific traits, affecting the evolution of a population.

63. What is the role of environmental factors in evolution?

Answer: Environmental factors, such as climate change and natural disasters, can cause changes in populations, influencing the evolution of species.

64. How does evolution shape the diversity of life on Earth?

Answer: Evolution, through processes such as natural selection, speciation, and adaptation, has led to the incredible diversity of life on Earth.

65. What is HIV?

Answer: HIV is a virus that attacks the immune system and can lead to AIDS.

66. What is AIDS?

Answer: AIDS is a disease caused by HIV that weakens the immune system, making a person vulnerable to infections and illnesses.

67. How is HIV transmitted?

Answer: HIV is transmitted through bodily fluids such as blood, semen, vaginal fluids, and breast milk.

68. Can HIV be cured?

Answer: No, there is currently no cure for HIV. However, antiviral medications can help manage the virus and slow its progression.

69. What is the difference between HIV and AIDS?

Answer: HIV is a virus that leads to AIDS while AIDS is a disease caused by HIV that weakens the immune system.

70. What are the symptoms of HIV?

Answer: Early symptoms of HIV can include flu-like symptoms, fever, fatigue, and swollen glands. In later stages, it can cause opportunistic infections, weight loss, and other symptoms.

71. How can one prevent the transmission of HIV?

Answer: One can prevent the transmission of HIV through practices such as using condoms, avoiding sharing needles, and taking antiviral medications.

72. What is the difference between STI and STD?

Answer: STI and STD are used interchangeably and refer to the same thing, sexually transmitted infections.

73. What are some common STIs?

Answer: Common STIs include chlamydia, gonorrhea, herpes, syphilis, and human papillomavirus (HPV).

74. How are STIs transmitted?

Answer: STIs are transmitted through sexual contact, including vaginal, anal, and oral sex. They can also be transmitted through sharing needles.

75. What are the symptoms of STIs?

Answer: Symptoms of STIs can vary, but can include discharge, itching, sores, and pain during urination. Some STIs have no symptoms, making regular testing important.

76. How can STIs be prevented?

Answer: STIs can be prevented through practices such as using condoms, reducing the number of sexual partners, and getting tested regularly.

77. Can STIs be cured?

Answer: Some STIs can be cured with antibiotics, while others can only be managed with treatment.

78. Explain is the goodness of getting tested for STIs.

Answer: Getting tested for STIs is important to diagnose and treat any infections, prevent transmission to others, and protect one’s overall sexual health.

79. What is the importance of using condoms?

Answer: Using condoms is important to reduce the risk of transmission of STIs and unintended pregnancy.

80. Can STIs affect fertility?

Answer: Yes, STIs can affect fertility by causing damage to reproductive organs, leading to infertility or increased risk of miscarriage.

81. What is the connection between HIV and STIs?

Answer: People living with HIV are at an increased risk of acquiring STIs, and having an STI can increase the risk of transmission of HIV.

82. Can a person with HIV still have a sexual life?

Answer: Yes, a person with HIV can still have a sexual life. It is important for them to practice safe sex, take antiviral medications, and manage their overall health.

83. What is the impact of HIV and AIDS on society?

Answer: HIV and AIDS have significant social, economic, and health impacts on individuals, families, and communities.

84. What is the role of education in preventing the spread of HIV and STIs?

Answer: Education is important