DIR Return Create A Forum - Home
       ---------------------------------------------------------
       Examwizardss
  HTML https://examwizardss.createaforum.com
       ---------------------------------------------------------
       *****************************************************
   DIR Return to: O'level Exams 
       *****************************************************
       #Post#: 278--------------------------------------------------
       Re: FREE 100 CORRECT 2013 WAEC GCE BIOLOGY ANSWERS AVAILABLE HER
       E
       By: Ebenezer Date: September 17, 2013, 9:20 am
       ---------------------------------------------------------
       (2a) Reproduction: This is define as a process in which
       living organism give birth to their younger ones
       (2b)
       Tabulate
       SEXUAL
       i. Sexual: It involves the formation of gamete cells
       ii. Sexual: It involves two parent cell
       iii. Sexual: Offspring number is controlleable
       iv. Sexual: It involves the passing over of character
       from generation to generation
       v: Sexual: It involves high level of sexual
       Asexual
       i.Does not involve gamete cell
       ii.Involves only one parent
       iii.Character cannot be passed on to offspring
       iv.It does not involves any level of Competition
       v.Number of offspring is not controlleable
       (2c) Advantages of sexual reproduction
       i. It allows passing over of genetic characters from
       generation to generation
       ii. It allows controlleable number of offspring
       iii. It involves cell duplication
       (2di) The female reproductive structure of plant is
       known as gymneocium. It has an apical end known as
       the stigma, the stigma opens during reproduction
       (pollination) to recieve pollen grains from the anther.
       It also have ovule which develops into seed of plant
       and ovary which develops into fruit of the plant
       (2dii) Factors Necessary for seed germination
       - Presence of water
       - Favourable temperature
       #Post#: 280--------------------------------------------------
       Re: FREE 100 CORRECT 2013 WAEC GCE BIOLOGY ANSWERS AVAILABLE HER
       E
       By: Ebenezer Date: September 17, 2013, 9:47 am
       ---------------------------------------------------------
       (3a)
       Yellow: Deficiency of Nitrogen and Magnesium
       (chlorosis)
       Purple: Defieciency of Phosphorus
       Orange: Defieciency of Iron
       (3b)
       i. Use of manure
       ii. Planting of legunious crops
       iii. Crop rotation
       (3c)
       SIMILARITIES
       i. Present of crop in both organisms digestive
       system
       ii. Mid-gut is present in both organisms digestive
       system
       iii. Presence of caecum in both organisms
       iv. They both have narrow Oesophagus
       DIFFERENCES
       i. Presence of tongue in the mouth of bird but absent
       in that of crockroach
       ii. Mouth of bird is modified into beak while that off
       cockroach is modified into maxilla and mandible
       iii. Hind gut of birds ends in cloaca, while that of
       crockroach ends in the anus.
       iv. Pancrease is presence in that of birds while it is
       absent in that of crockroach
       (3d)
       i. Dysentary
       ii. Constipation
       iii. Stomach irritation(acidiosis)
       iv. Bloating
       *****************************************************