during prophase i of meiosis, crossing over between the sister chromatids occurs. what is the purpose of this process? to produce genetic variation.
to duplicate the dna.
to remove the nuclear envelope.
to produce the spindle fibers.

What prevents odyssey from killing the sleeping cyclops

One function of the immune system is to attack the foreign cells to protect the body. in organ translate , the body recongnizes that the new organ is made of foreign cells. wha kind of medicine would you give a patient to increase the chances of transplate success

Can create a hboth of these instruments can measure wind speed. doppler radar and psychrometer anemometer and hygrometer doppler radar and anemometer radiosonde and psychrometer