Qualification > Sciences
Biolgy paper 1 help!
hdbkiwi:
--- Quote from: GodOfWar on June 06, 2009, 09:56:49 am ---ERMM.... im confused ??? :-[
I just want to clarify this whole aphid and phloem thing.
The question was : " Aphids feed on the contents of phloem. What do they lack in their diet ? "
And the choices were : A amino acids
B fats
C sucrose
D water
I thot that aphids were green plants that stuck to plants' stems, so they cud produce glucose but needed amino acids as they weren't able to absorb nitrate ions from soil [ we did a question like this once in some ppr 3 but i noe now they were NOT aphids ] so niways i had water and fats COMPLETELY ruled out.
SOOO help me out here.... most ppl here say fats . BUT HOW DO YOU KNOW APHIDS LACK FATS IN THEIR DIET?
Water is ruled out but it cud easily be amino acid and sugars? y fats?
P.S. i chose A.
--- End quote ---
An aphid is an insect-the answer is fats because the plant makes amino acids and transports them via the phloem-it also transports sucrose, which is dissolved in water, so the only logical answer can be B-yes the plants have FAT but mainly in their fruits (for example the avocado)
girl_92:
--- Quote from: Friends on June 06, 2009, 06:29:07 am ---
--- Quote from: thukon on June 06, 2009, 06:26:22 am ---
--- Quote from: Friends on June 06, 2009, 06:13:09 am ---
--- Quote from: john12345 on June 06, 2009, 06:11:18 am ---hey can sum1 please tell me de answer for de glucose thing
wat is glucose carried in ??
was it arteries only??
--- End quote ---
Nope. It is artery and veins both.
--- End quote ---
yes!!! I put areteries and veins.
Im asking again, what did u ppl put for the monocot leaf? The answer is D, the long thin one.
@vivek. Its C. Since its a 3:1 ratio, PP x Pp is the answer. The offspring will be PP, Pp, Pp, and pp, so 3 purple for 1 yellow. Simple.
--- End quote ---
Monocoat is D
And if PP X Pp is the answer u r wrong. Because offspring will be PP,PP,Pp and Pp
Therefor all purple. and No yellow.
hey not all were of the same colour most of dem were black n sum were white im tlkin accordin to da pic so it has to be 75% purple so this makes it PpxPp
--- End quote ---
°o.O-hash94-O.o°:
no u r wrong the mieosis is non identical and mitosis is identical!!!
hdbkiwi:
--- Quote from: hdbkiwi on June 06, 2009, 09:57:52 am ---
--- Quote from: aquarian93 on June 06, 2009, 09:48:13 am ---
--- Quote from: hdbkiwi on June 06, 2009, 09:45:48 am ---I liked the bio paper :) Hey for the genes thing
Meiosis was identical
mitosis was non-identical (nucleus now has haploid number of chromosomes)
right?
--- End quote ---
isnt it the other way around? meosis is haploid
--- End quote ---
argh haha yeah so Mitosis is identical
Meiosis is haploid-messed that one up ah well :)
--- End quote ---
yep I know now thanks: P
girl_92:
--- Quote from: Friends on June 06, 2009, 08:02:07 am ---
--- Quote from: MB on June 06, 2009, 08:00:56 am ---Does anyone know the answer of the one with the arrow pointing downwards only?
--- End quote ---
I did stomata as water escapes from it.
--- End quote ---
it betta be stomata cuz frm da xylem it will even move upwards
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