- Messages
- 47
- Reaction score
- 11
- Points
- 8
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It means that the species that are going to interbreed there is no isolating mechanism between them. For example they are not geographicallly or reproductively isolated from each other. Only species that acre capable of breeding are made to interbreed artificially.what does it mean no iolating mechanism operating
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interbreedIt means that the species that are going to interbreed there is no isolating mechanism between them. For example they are not geographicallly or reproductively isolated from each other. Only species that acre capable of breeding are made to interbreed artificially.
Yes different but closely related species.interbreed
with reference to an animal) breed or cause to breed with another of a different race or species.
"wolves and dogs can interbreed"
does interbreed happen with different species
Yesgenetic screening and dna sequencing is on syllabus?
no notes for them in book
Genetic screening page 467no notes for them in book
do u have notes
2- nets with small holes prohibited because catches smaller fish which are economically insignificant. Also when small fish are not allowed to grow the stocks wipe out with the passage of time.Suggest how the stocks of Atlantic cod may be increased.
stop / reduce, fishing ; A correct ref. to quotas / moratorium
2. ref. to size of nets ;
3. ref. to methods of fishing ;
4. control pollution ;
5. education ;
6. captive breeding and release / restocking from fish farms ;
7. ref. to marine reserves ;
MP2 AND 3 IS NOT CLEAR
point 1 is just the stimulus that triggers the selections.Coelacanth haemoglobin has a very high affinity for oxygen, suggesting that coelacanths,
which have been captured at depths of between 200 m and 400 m, live in water that has
a low concentration of oxygen.
Explain how an environmental factor, such as the low concentration of oxygen in deep
water, can act:
as a stabilising force in natural selection
ref. mutation ; ?? what should i write for this
(ii) as an evolutionary force in natural selection.
1. ref. change in oxygen concentration ;
2. (low) oxygen concentration acts as selective agent ;
3. some individuals (in population) are better adapted ;
4. these are more likely to survive ; ora
5. directional selection ;
6. sketch graph ;
7. populations develop in different concentrations of oxygen ;
8. disruptive selection ;
9. sketch graph ;
help me to write answer for this
MP 1 is not clear and 7
did you find this question in CIE past papers or OCR?The optimum pH for the activity of rubisco is pH8.
Explain why the illumination of chloroplasts leads to optimum pH conditions for rubisco.
excited electrons leave, chlorophyll a / photosystem ;
2 pass along ETC ;
3 protons present from photolysis ;
4 protons (pumped) into intermembrane space ;
5 rubisco is in stroma ;
6 idea that protons leaving stroma raises pH ;
cie 9700 paper 4di
did you find this question in CIE past papers or OCR?
And where did you find this question?cie 9700 paper 4
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