Several small stimuli on a similar location produced a reflex when a single stimulus did not. this led to the idea of that synaptic input from several locations can have a cumulative effect and trigger a nerve impulse:

scientists have discovered that hiv does not cause aids by the virus's direct effect on the host's immune cells, but rather through the cells' lethal influence on one another. researchers from the gladstone institutes have revealed that hiv does not cause aids by the virus's

a chain link fence because there so tiny even my albino donkey can't get out

i believe it's c. the trait for large beaks will be passed on to future generations through natural selection.

since eventually smaller beaks would have to find another source of food or even eventually just die out from the lack of food.

a compound light microscope is used to magnify objects in steps.  

hope it