is dna in a sexually reproducing organism one single chain with dna from one parent coming first,with the other parent's dna joining it as it ends.or do the two strands lie side by side,without joining.Or do they lie side by side and join at some point?
the purpose of asking the question is...
tardigrades[water bears] can resist pressures upto 6000 atm,can resist unbelievably high radiation levels,have even survived in space.how is it then,that it is eaten by nematodes,amoeba and other tardigrades?? to be precise,how can they be killed??-the digestive juices of other animals should...
an electric field due to one particle exists even if there is no other particle to interact with,right? at the exact centre of the sphere,the fields coming from all directions will cancel out completely.move even a little away from the centre,the field would not be an exact zero[there are no...
field inside conductor-is it zero every where??
consider a perfectly spherical neutral conductor.suppose a few electrons with net charge q is deposited on it.the electrons will spread out[due to mutual repulsion] and distribute themselves in such a way that the net field inside the sphere is...
i completely agree with kmarinas86. the field SHOULD continue to change for 1 year[approx].so far,none of the members have posted a convincing reason why it shouldn't.after all,information does take time to travel,and nothing happens instantaneously.once the charge is taken out of the sphere,the...
okay.consider a case when someone is conducting an experiment to measure current produced by photo-electric effect.the threshold frequency is that of "blue" photons.but the source is emitting "green" photons.then,is it true that if he moves the object at a minimum required speed towards the...
does doppler effect affect ENERGY of photon??
i have tried to make the question as clear as possible,but in the process,have made it a bit too long. i request you to be patient-
suppose a source is emitting a photon after equal intervals of time.an observer,who was initially at rest w.r.t the...
why does the wavelength of light or sound waves affect the degree of bending?I know the mathematical formula for fringe width,but i want to know the physical reasons behind the phenomenon of bending.
Taking the example of light passing through a small slit,the huygens principle talks about...
Recombinant dna technology-[how are specific genes chosen]??
IN recombinant dna technology,certain segments of dna are removed from one organism and put in another.How are are specific portions of DNA removed from certain animals and fused into others?? More importantly,how do scientists know...
i've read that some molecules release absorbed photons in the opposite direction[causing reflection] while some release it in the original direction[making the object transparent]...what molecular factors decide this phenomenon?why do some objects reflect?why are others transparent?
While changing media,why does light bend? And why does blue light bend more than red? It would be helpful if i get an answer related to molecular composition and interaction of photons with molecules.