University:
Brigham Young University
Course:
BIO 130 | Biology
Academic year:

2023
Views:

27

Pages:

4
Author:

SpaceSerenade

what is biological Rythm? Give an account of its type and characteristic what is the role of different factors in their cutainment? Biological Shythms are the intunal mech-anisms that provide a inean of measuring length of Organi time to the Organisins. Biological Phyllums as living also kubon Biological clocks or Internal clock or Circadian Rythms - All animals possess. innate biological Clocks which are driven. by the biochemical mechanisms. Envin Bunning (1936) biologist to was the fist carry out extensive work on biological rytterns. Types of Biological Reyttum. Circannual Rhythms cincalunar Rirythms Tidal Rhythms Circatidal Rhythms Ciscasyzygic Rythms Circadian Rhythms Characteristics of Biological shythm → Circannual Rhythms •They show one- year periodicity Examples - large no. of animals seproduce Once in a year flowering in plants abo takes place once in a year. - famous migextion of monarch bulliflig from North America to Mexico and. back follows Annual cyde. - Arctic and antartic animals. geneully follow annul cycle. Circalunar Rhythms These shy thoms synchronise with the 28 day phases of moon and tidal shyltims Example Palolo woun lives in deep sea but swims to surface on the first dry of the first quarter of moon in November in fiji 7 Tidal Rhythms They are synchronised with the periodic rise and fall in sea level due to Jeavitational full of sun and moon and Centrifugal force of the earth They are rolation daily con tides due to earth's its axis. 4 Circasyzgic Rhythms They follows fortnightly cyck high of 14.7 days of high tide after new moon or full moon. Examples - molluscs exhibit egg laying behaviom This according to this periodicity - Periwinkle, also comes out of bustous on sea shores high tides. during A Circatidal Rhythms These that follow 12.4 01 24.8 hour cycle synchronised with low and righ tides twice. a day Example - as Animals lives in burrows such Polychaetes, Planarians, Gal etc. are submerged and ex fond Alternately, and in the process get food brought hy water currents > Circadian Rhythms. These Rythms follow 24 how cycle of activity and sleeping synchronised with light and darkness. Examples - Rady tretabolison and selcase of hounones - Birds are mostly dinmel. and Bats noctumel which find thei se way by echolocation factors affects biological Rhythms - light is the major slutside factor controlling the body's circadian rythms. - other ses including food enveronment cores ind Intake and Activity level, may help to synchronize the circadian Rhyttum