General Biology: Definitions and explanations page 6 PDF | Download eBooks

Learn general biology terms with definitions and explanations, biology terminologies (Page 6) for biology degree programs.


  1. What is Endothelium?
    Endothelium refers to cells that line the interior surface of blood vessels and lymphatic vessels, forming ...
  2. What is Endothermic?
    An endotherm has the ability to maintain a constant body temperature independent of the environment. the ...
  3. What are Endotoxins?
    In contrast to exotoxins, endotoxins are released only when the bacteria die and their cell walls ...
  4. What is Energy?
    Energy is the ability to do work. it is the property that comes from different sources ...
  5. What are Enhancers?
    An enhancer is a short (50-1500 bp) region of dna that can be bound by proteins, ...
  6. What is Enteric division?
    The enteric nervous system (ens) or intrinsic nervous system is one of the main divisions of ...
  7. What is Entropy?
    Entropy is the measure of a system's thermal energy per unit temperature. this energy is used ...
  8. What are Enzymes?
    Enzymes are proteins that have an important function in speeding up a reaction. they help by ...
  9. What is Epidemic?
    A widespread occurrence of an infectious disease in a community at a particular time. for example ...
  10. What is Epidemiology?
    Epidemiology is the study and analysis of the distribution and determinants of health and disease conditions ...
  11. What is Epidermis?
    The epidermis is the outermost of the three layers that make up the skin, the inner ...
  12. What is Epigenetic inheritance?
    Epigenetic inheritance is a remarkable discovery and it goes against the idea that inheritance happens only ...
  13. What is Epinephrine?
    Adrenaline is also known as epinephrine. it is a hormone and a neurotransmitter. adrenaline is normally ...
  14. What is Epiphyte?
    Epiphytes produce and gather their own nutrients; they do not tap into their hosts for sustenance. ...
  15. What is Epistasis?
    Epistasis is the phenomenon where the effect of one gene is dependent on the presence of ...
  16. What is Epithelial tissue?
    Epithelium is one of the four basic types of animal tissue, along with connective tissue, muscle ...
  17. What is Epitope?
    An epitope is also called as antigenic determinant. it is the part of an antigen that ...
  18. What are Erythrocytes?
    Erythrocytes are red blood cells that are the most common type of blood cell and the ...
  19. What is Erythropoietin?
    Erythropoietin is also known as haematopoietin. it is a glycoprotein cytokine secreted by the kidney in ...
  20. What is Esophagus?
    The esophagus or esophagus, commonly known as the food pipe or gullet, is an organ in ...
  21. What is Essential element?
    The elements that are required for plants to complete their lifecycle are called essential elements. plants ...
  22. What is Estrous cycle?
    The estrous cycle is the periodic physiological changes that happen due to fluctuations in reproductive hormones ...
  23. What is Ethylene?
    Ethylene is a gas hormone and promotes ripening of many types of fruit, leaf abscission, and ...
  24. What is Etiolation?
    Etiolation is a process in flowering plants grown in partial or complete absence of light. it ...
  25. What is Euchromatin?
    Euchromatin is a lightly packed form of chromatin that is enriched in genes, and is often ...
  26. What are Eukaryotic cells?
    Eukaryotic cells have a membrane enclosed nucleus in addition to membrane enclosed organelles. unlike prokaryotes, these ...
  27. What is Evolution?
    The change in features and characteristics of a specie over several generations results in evolutions. the ...
  28. What is Evolutionary tree?
    An evolutionary tree is also called a phylogenetic tree. it is a diagram that represents evolutionary ...
  29. What is Excretory System?
    The excretory system is a passive biological system that removes excess, unnecessary materials from the body ...
  30. What is Exergonic reaction?
    An exergonic reaction is a chemical reaction where the change in the free energy is negative. ...
  31. What is Exocytosis?
    Exocytosis is a form of active transport and bulk transport in which a cell transports molecules ...
  32. What is Exon shuffling?
    Exon shuffling is a distinct molecular mechanism for the formation of new genes. it is a ...
  33. What are Exons?
    An exon is any part of a gene that will encode a part of the final ...
  34. What is Exoskeleton?
    An exoskeleton is the external skeleton that supports and protects an animal's body, in contrast to ...
  35. What are Exotoxins?
    Endotoxins are responsible for many diseases. for example, cholera, a dangerous diarrheal disease, is caused by ...
  36. What are Expansins?
    Expansin refers to a family of closely related nonenzymatic proteins found in the plant cell wall, ...
  37. What is Experiment?
    An experiment is a procedure carried out to support, refute, or validate a hypothesis. experiments vary ...
  38. What is Expression vector?
    An expression vector, otherwise known as an expression construct, is usually a plasmid or virus designed ...
  39. What is Extracellular matrix (ECM).?
    The extracellular matrix (ecm) is a three-dimensional network of extracellular macromolecules. many molecules are present in ...
  40. What are Extreme halophiles?
    Halophiles are organisms that thrive in high salt concentrations. they are a type of extremophile organism. ...
  41. What are Extremophiles?
    An extremophile is an organism that thrives in physically or geochemically extreme conditions that are detrimental ...
  42. What is F1 generation?
    In mendelian genetics, an f1 hybrid which is also known as filial 1 hybrid, is the ...
  43. What are Facultative anaerobes?
    A facultative anaerobe is an organism that makes atp by aerobic respiration if oxygen is present, ...
  44. What are Fate maps?
    Fate mapping is a technique that is used in the study of developmental biology. it is ...
  45. What is Fatty acid?
    Fatty acid is a carboxylic acid with a long aliphatic chain, which is either saturated or ...
  46. What are Feces?
    Feces are the solid or semisolid remains of the food that could not be digested in ...
  47. What is Feed back regulation?
    The feed back regulation is dependent upon the output of the reaction. basically its process by ...
  48. What is Feedback inhibition?
    Feedback inhibition is the phenomenon where the output of a process is used as an input ...
  49. What is Fermentation?
    This process has different definitions in biochemistry and biological terms. here fermentation is being referred to ...
  50. What is Fertilization?
    Fertilization is the reproductive process that happens from the fusion of gametes to form a new ...
  51. What is Fetus?
    A fetus is the unborn progeny of an animal that grows from an embryo. in humans, ...
  52. What is Fever?
    A fever is a body temperature that is higher than normal. a normal temperature can vary ...
  53. What is Fibrous connective tissue?
    Fibrous connective tissue is a type of connective tissue which is composed of parallel bundles of ...
  54. What are Filter feeders?
    Filter feeders are a sub-group of suspension feeding animals that feed by straining suspended matter and ...
  55. What is Fimbriae?
    In bacteriology, a fimbria is also referred to as an attachment pilus by some scientists, is ...
  56. What is Flaccid?
    When a plant cell in an isotonic solution, the plasma membrane is not pressed tightly against ...
  57. What is Flagellum?
    A flagellum is a lash-like or a thread like appendage that protrudes out from the cell ...
  58. What is Florigen?
    Florigen is also called the or flowering hormone and is the hypothesized hormone-like molecule responsible for ...
  59. What are Fluid feeders?
    Fluid feeders suck nutrient-rich fluids from a living host. fluid feeders may also be herbivores or ...
  60. What are Fossils?
    A fossil is any preserved remains, impression, or trace of any once-living thing from a past ...