General Biology: Definitions and explanations page 11 PDF | Download eBooks

Learn general biology terms with definitions and explanations, biology terminologies (Page 11) for biology degree programs.


  1. What is Monosaccharide?
    Simplest sugars that usually act as monomers to chain up and form larger chains of sugars ...
  2. What is Monosomy?
    Monosomy is an example of aneuploidy when the chromosomes fail to separate during meiosis. monosomy results ...
  3. What is Morphogenesis?
    Morphogenesis is the biological process that causes an organism to develop its shape. it is one ...
  4. What is Morphological species concept?
    Morphological species concept actually characterizes a species by body shape and other structural features and is ...
  5. What is mRNA?
    Messenger rna is a large family of rna molecules that convey genetic information from dna to ...
  6. What is Mucus?
    Mucus is a slippery aqueous secretion produced by, and covering, mucous membranes. mucus serves to protect ...
  7. What is Multifactorial character?
    The type of hereditary pattern seen when there is more than one genetic factor involved and, ...
  8. What is Multigene?
    A gene family is a set of several similar genes, formed by duplication of a single ...
  9. What is Multiple fruit?
    Multiple fruits, also called collective fruits, are fruiting bodies formed from a cluster of fruiting flowers, ...
  10. What is Multiplication rule?
    Rule of multiplication if events a and b come from the same sample space, the probability ...
  11. What is Muscular System?
    The muscular system is an organ system consisting of skeletal, smooth and cardiac muscles. it permits ...
  12. What are Mutagens?
    Any physical or chemical agents that have the ability to alter the dna structure are known ...
  13. What are Mutations?
    Any kind of permanent changes in the nucleotide sequence of the dna is called a mutation. ...
  14. What is Mutualism?
    Mutualism describes the ecological interaction between two or more species where each species benefits. mutualism is ...
  15. What is Mycelium?
    Mycelium is the vegetative part of a fungus or even any fungus-like bacterial colony, consisting of ...
  16. What is Mycorrhizae?
    A mycorrhiza is a symbiotic association between a fungus and a plant. the term mycorrhiza generally ...
  17. What is Mycosis?
    In humans, skin mycoses include the disease ringworm, so named because it appears as circular red ...
  18. What is Myoglobin?
    Myoglobin is an iron- and oxygen-binding protein found in the muscle tissue of vertebrates in general ...
  19. What are Natural killer cells?
    Natural killer cells, also abbreviated to nk cells, are a type of cytotoxic lymphocyte that are ...
  20. What is Natural selection?
    Natural selection was first proposed by darwin. the individuals with the traits best suited for survival ...
  21. What are Nephrons?
    The nephron is the microscopic structural and functional unit of the kidney and comprises of a ...
  22. What is Nervous system?
    The nervous system is the part of an animal that coordinates its actions by transmitting signals ...
  23. What is Nervous tissue?
    The nervous tissue is also called neural tissue or nerve tissue. it is the main tissue ...
  24. What are Neurohormones?
    A neurohormone is any hormone produced and released by neuroendocrine cells into the blood. these neaurohormones ...
  25. What are Neurons?
    A neuron, also known as a nerve cell, is an electrically excitable cell that communicates with ...
  26. What is Neurotransmitter?
    Neurotransmitters are chemical signals that help in neurotransmission. these chemical messenger help transmit signals across a ...
  27. What are Neurotransmitters?
    Neurotransmitters are endogenous chemicals messengers that enable neurotransmission. it is a type of chemical messenger which ...
  28. What is Neutral evolution?
    The neutral theory of molecular evolution holds that most evolutionary changes at the molecular level, and ...
  29. What are Neutrophils?
    Neutrophils are also known as neutrocytes. these cells are the most abundant type of granulocytes and ...
  30. What is Nitric oxide?
    Nitric oxide (no) is fundamentally a gas and it functions in the body as both a ...
  31. What is Nitrogen cycle?
    The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into multiple chemical forms ...
  32. What is Nitrogen fixation?
    Nitrogen fixation is a process by which nitrogen in the air is converted into ammonia (nh3) ...
  33. What is No-till agriculture?
    No-till farming is a way of growing crops or pasture from year to year without disturbing ...
  34. What are Nodes?
    Nodes is simply the place on a plant stem where a leaf is attached. ...
  35. What are Nodules?
    Many leguminous plants contain symbiotic bacteria called rhizobia within the nodules, producing nitrogen compounds that help ...
  36. What is Non disjunction?
    Sometimes due to an error during cell division, the chromosomes fail to separate properly. there are ...
  37. What is Non sense mutation?
    A point-nonsense mutation is a point mutation in a sequence of dna that results in a ...
  38. What is Nonshivering thermogenesis?
    Nonshivering thermogenesis is defined as an increase in metabolic heat production (above the basal metabolism) that ...
  39. What is Notochord?
    The notochord is a flexible rod made out of a material similar to cartilage. if a ...
  40. What is Nuclear membrane?
    Nuclear pores are small openings on the membrane of the nucleus which allows the entering of ...
  41. What is Nuclear transplantation?
    Nuclear transplantation is a method in which the nucleus of a donor cell is relocated to ...
  42. What is Nuclease?
    A dna cutting enzyme is named nuclease. many different types of nuclease are present that severe ...
  43. What is Nucleic acid hybridization?
    Single-stranded deoxyribonucleic acid (dna) or ribonucleic acid (rna) molecules anneal to complementary dna or rna. though ...
  44. What is Nucleic acid probe?
    A nucleic-acid fragment that is complementary to another nucleic-acid sequence and thus, when labeled in some ...
  45. What are Nucleic acids?
    Nucleic acids are small biopolymers that form the genetic material of essentially all known forms of ...
  46. What is Nucleoid?
    Prokaryotes do not have a nucleus. instead their dna is concentrated in a region inside the ...
  47. What is Nucleolus?
    The nucleolus is the largest structure which is present inside the nucleus of eukaryotic cells. it ...
  48. What is Nucleosome?
    A nucleosome is a basic unit of dna packaging in eukaryotes, consisting of a segment of ...
  49. What is Nucleotide-pair substitution?
    The replacement of a specific nucleotide pair by a different pair, often mutagenic. this is a ...
  50. What is Nutrition?
    Nutrition is the science that interprets the interaction of nutrients and other substances in food in ...
  51. What are Obligate aerobes?
    An obligate aerobe is an organism that requires oxygen to grow. through cellular respiration, these organisms ...
  52. What are Obligate anaerobes?
    Obligate anaerobes are microorganisms killed by normal atmospheric concentrations of oxygen (20.95% o2). oxygen tolerance varies ...
  53. What is Ocean acidification?
    When oceans uptake the carbon dioxide from air, the ph of the ocean decreases. this has ...
  54. What is Okazaki fragment?
    Dna replication happens on both the strands meaning that both strands serve as templates for the ...
  55. What are Oncogenes?
    Oncogenes are those genes that have a primary role in causing cancer. most normal cells undergo ...
  56. What is Oogenesis?
    Oogenesis is the variation of the ovum into a cell proficient to further develop when its ...
  57. What is Open circulatory system?
    Open circulatory systems is usually observed in crustaceans, insects, mollusks and other invertebrates. this is different ...
  58. What is Operator?
    Operator genes contain the code necessary to begin the process of transcribing the dna message of ...
  59. What is Operon?
    An operon is a functioning unit of dna containing a cluster of genes under the control ...
  60. What is Oral cavity?
    In animal anatomy, the mouth is also known as the oral cavity or the buccal cavity. ...