ICSE/ISC Board Exam: Revision Terminology Part 51

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  • Demographic process – fertily, mortality, marriage, migration, social mobility.
  • Year 1921 – big divide
  • Sex ratio = female/1000 males.
  • Popl density =
  • Popl depends on –
  • Biotic potential = reproduction – capacity to produce offspring under naturalendi.
  • Carrying Capacity = All environments can carry only a limited size of population & is constant.
  • Prevent ovulation – mala D = daily.
  • Prevent ovulation – saheli = Weekly.
Reindeer, Lemmings, Algae
Commonly Seen in Yeast and Human Beings
  • Malthus – population grow geometrically, food – arthimetically.
  • Malthus essay on human popl - in popl a) decrement b) increment in birth.
  • JRD Tata – 1992 united nations popl a ward.
  • Copper T, loop, spiral, ring, bow, shield.
  • Mech birth control devices – condoms (male) , cervical caps (female) , diaphragm (female) , IVDS.
  • Cervical caps ⇾ prevent sperm from entering uterus.
  • Abortion = MTP.
  • Combined pills (estrogen & progesterone) o = inhibit overlation by inhibiting normal release of FSH & LH from pituitary.
  • Abstinonce (a voidance of sex) – to refrain from indulgence.
  • Test tube baby – embryo transplanted at 32 celled stage in mother՚s womb.
  • Amino centesis prior sonography to avoid damage to foetus & placenta sex, chr abnormality, engymatic abnormality (phemyl ketourea)
  • Birth control – Permanent (a) Vascetomy – cut in vasa deferentia.

(b) tubectomy – cut in sallopian tube.

(c) tubal ligation – tying of sallopian tube.

  • Electric pube – male contraceptive.
  • Spermacidal cream – lactic acid, boric acid, citric acid, ZnSo4, KMno4, neem oil.
  • Water detected on moon, Europa of Jupiter & Titan of Saturn.
  • Biopoiesis = Origin of life.
  • Biogeny = Origin of first life.
  • Biogenesis = Origin of life from life.

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