Qualification > Sciences

CHEM AND BIO HELP AND TIPS HERE

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8T:

--- Quote from: ~!Intoxication!~ on June 07, 2010, 08:58:46 pm ---
Has 3 pairs of legs. Its a mosquito.



Insects - 3 pairs of (jointed) legs, body divided into head-thorax-abdomen, 2 pair of wings/antennae, Eg-housefly, beetle cockroach

Arachnids- 4 pairs of (jointed) legs, head and thorax fused- abdomen, lack wings and antennae, compound eyes Eg, Spider, scorpion

Crustacea- 1/2 pairs of legs, body divided into head-thorax-abdomen, chitinous exoskeleton. Eg. Crabs, lobsters

Myriapods-Segmented body, many legs(usually 2 per segment), Obvi. not divided into head-thorax-abdomen. Eg. Centipede, millipede


--- End quote ---

LOADS OF THANKS 4 THE EXTRAS :D

SNA:

--- Quote from: diva_sparkles on June 07, 2010, 08:53:16 pm ---here q18 plz

--- End quote ---
i think the answer is B.this is how i think would be the reason. for P, the liquid moves to the left as soda lime adsorbs the co2 which lowers air pressure in test tube. thus, higher air pressure outside tube pushes liquid towards the test tube. for Q,air pressure inside test tube and outside is the same,so the liquid stays at the same place.the glass beads did not effect the experiment.

Helium:
Which one and why plz ???

diva_sparkles:

--- Quote from: SNA on June 07, 2010, 09:06:08 pm ---i think the answer is B.this is how i think would be the reason. for P, the liquid moves to the left as soda lime adsorbs the co2 which lowers air pressure in test tube. thus, higher air pressure outside tube pushes liquid towards the test tube. for Q,air pressure inside test tube and outside is the same,so the liquid stays at the same place.the glass beads did not effect the experiment.

--- End quote ---

Thanks alot!! gud luck 4 bio

ksitna:
i think D
because xylem is a hollow tube and doesnt absorb anything and it cant contract either
it is dead
and it is used for support so.. D
tho i may be wrong

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