well the exact words for these peritubular capillaries surrounding loop of henle is vasa recta
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A2 Biology | Post your doubts here
- Thread starter hassam
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Uhm how about studying?whats intraspecific competition...
people..tell me what and how to revise...i don't feel like studying at all...dunno what to do
Anyways, just study notes, no time for pastpapers now i think
dats more or less d entire syllabus nah lol
thanx a bunch
thanx a bunch
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what are the cultural ethical economic and moral reasons for maintaining biodiversity?
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how to include genetic drift in the answer of isolating mechanisms and natural selection?
genetic drift leads to random changes in allele frequencies over time (just due to chance of passing certian alleles more than others without any reaosn....just due to pure chance.....seemed to me a quite VAGUE idea)e
it is important for us to preserve biodiversity for future genration to come.........some people belive that these species like us have also a right to extinct and we have no right whatsoever to make them extinct(or kill them)
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Disadvantages of cross pollination..
when alleles are passed onto the wild when a weed cross pollinates with a crop plant which has been genetically modified... and hence herbicides are no longer effective on weeds coz they may have the resistant gene..
Smaller vessels can be used because products are continuously being harvested and nutrients are continuously being added..no down time and not harvested in batches..
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Artificial Insemination being carried out...and the fertilized embryos then being implanted in surrogate mothers which might even be of a different species..
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Assalamoalaikum wr wb!!
Describe the main structural features of an ATP molecule.
Describe the main structural features of an ATP molecule.
1. a nucleotide ;
2. with three phosphate groups ;
3. an organic / nitrogenous base / adenine ;
4. a pentose sugar / ribose ;
5. ref. ester linkages / covalent bonds ;
ATP is a nucleotide. It consists of adenine (an organic base) and ribose (a pentose sugar). This is combined with three phosphate groups to make ATP.
What about the last ms point? How do I include it in my answer?
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Can questions regarding applications part came in section B?
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EXPLAIN THE ROLE OF ISOLATING MECHANISM IN EVOLUTION OF NEW SPECIE?
WHY VARIATION IS IMPORTANT IN SELECTION?
HOW ALL ORGANISMS CAN POTENTIALLY OVERPRODUCE?
PLEASE WRITE EXPLAINED ANSWERS TO THESE QUESTION IN PARAGRAPH FORM.ACTUALLY I HAVE SEEN MARK SCHEME POINT ON THESE QUESTIONS BUT IM UNABLE 2 CONSOLIDATE THEM INTO A PARAGRAPH BECAUSE IM NOT MUCH CLEAR WITH THIS TOPIC..PLEASE HELP ME OUT..TOMORROW IS MY ALEVEL BIOLOGY PAPER 4 EXAM....THANKS!
WHY VARIATION IS IMPORTANT IN SELECTION?
HOW ALL ORGANISMS CAN POTENTIALLY OVERPRODUCE?
PLEASE WRITE EXPLAINED ANSWERS TO THESE QUESTION IN PARAGRAPH FORM.ACTUALLY I HAVE SEEN MARK SCHEME POINT ON THESE QUESTIONS BUT IM UNABLE 2 CONSOLIDATE THEM INTO A PARAGRAPH BECAUSE IM NOT MUCH CLEAR WITH THIS TOPIC..PLEASE HELP ME OUT..TOMORROW IS MY ALEVEL BIOLOGY PAPER 4 EXAM....THANKS!