Qualification > Sciences
IGCSE BIOLOGY DOUBTS HERE !!!!
Blizz_rb93:
This is in the syllabus but i'm not sure of it.
Describe the growth of the pollen tube and it's entry into the ovule followed by fertilisation ?
THANK You =D
YogiBeAr:
hey
Describe the differences between sexual and asexual reproduction
thanks
Aadeez || Zafar:
--- Quote from: YogiBeAr on April 28, 2011, 11:42:39 am ---hey
Describe the differences between sexual and asexual reproduction
thanks
--- End quote ---
SEXUAL
- two parents needed
- gametes formed by meosis
- zygote is formed in this
- heriditerical data of Zygote/daughter cell not exactly same as their parents (GENOTYPE and PHENOTYPE of offsprings r differnt from there parent)
- chances of variation
ASEXUAL
- only one parent nedde
- no gametes formed
- daughter cell caryy the same information which the parent cell have
- reproduce mittically
- no chance of variation during reproduction
YogiBeAr:
thank you :)
i have another question ???
industrial fermenter and explain the need to provide
suitable conditions in the fermenter, including aseptic precautions, nutrients, optimum
temperature and pH, oxygenation and agitation, for the growth of microorganisms
i cant seem to find any info of this in my book. i have a little but not enough a (paragraph), it just goes of the subject an rabbles on a load irrelevant stuff :o
thanks for the help :)
Amelia:
--- Quote from: YogiBeAr on April 28, 2011, 02:44:45 pm ---thank you :)
i have another question ???
industrial fermenter and explain the need to provide
suitable conditions in the fermenter, including aseptic precautions, nutrients, optimum
temperature and pH, oxygenation and agitation, for the growth of microorganisms
i cant seem to find any info of this in my book. i have a little but not enough a (paragraph), it just goes of the subject an rabbles on a load irrelevant stuff :o
thanks for the help :)
--- End quote ---
I have attached the presentation.
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