Biological species concept - organisms who look similar and are able to interbreed freely and produce fertile offspring
Limitations -Not all organisms interbreed, e.g asexual reproduction in ulmus procera -Not all organisms look similar e.g male/female peacock
Phylogenetic species concept - groups organisms, based on biochemistry, morphology, behaviour and embryology >
cladistics - grouping organisms based on evolutionairy history.
kind of unsure on this spread, it's very very badly worded in the heinmann book.
I thought the definitions of the biological species concept and the phylogenetic species concept were the other way around?
Biological species concept - organisms who are similiar in appearance, physiology, anatomy, biochemistry and genetics, and who are able to interbreed to produce fertile offspring. They also remain reproductively isolated from other species. Phylogenetic species concept - organisms who are geopraphically separated and morphologically and behaviourally distinct from other species, even if their breeding capabilities are unknown.
I'm in the process of doing so...but there is a big hint for you MODULE 1 CONTENT CELLULAR CONTROL is what you must focus on....the emphasis on past papers is'nt really effective as it was...alot of the questions are relatively new...although it is still good practice...as the PhilipAllan conference they said they merely have 'adapted' past questions for the practicals and the written hmmm Though it is quite true since the A2 Photosynthesis practical was indeed adapted from a past paper...there's no reason why they can't recycle past questions...
Haha thank you! I'm sure you will be too Yeah, at least for the summer! At least we won't have OCR writing our uni exams... and it'll be all my favourite bits of biology so I'm happy
.. What type of Biology are you doing?
Same, I don't think I've ever revised more for an exam but I still feel like I know nothing.. never mind we'll be okay, just keep going
Ah, but when you're in the exam, your sympathetic nervous system kicks in, increasing blood flow to the brain .. You'll suddenly realise you remember lots of stuff!
Ah, but when you're in the exam, your sympathetic nervous system kicks in, increasing blood flow to the brain .. You'll suddenly realise you remember lots of stuff!
Ah, but when you're in the exam, your sympathetic nervous system kicks in, increasing blood flow to the brain .. You'll suddenly realise you remember lots of stuff!
I'm doing it all the time .. Yesterday my Dad made asked me to lift a few really heavy concrete slabs. All I was thinking about was the graduation of response and the sliding filament theory
I'm doing it all the time .. Yesterday my Dad made asked me to lift a few really heavy concrete slabs. All I was thinking about was the graduation of response and the sliding filament theory
can anyone please please please tell me what i need to know for genetic engineering human insulin. i have no clue. and i dont find the textbook useful can someone please break it down for me
I'm doing it all the time .. Yesterday my Dad made asked me to lift a few really heavy concrete slabs. All I was thinking about was the graduation of response and the sliding filament theory