learn and observe air resistance by throwing objects from considerable height a; tissue paper b: plastic spoon c: stainless steel spoon take a record of your findings and observations and jot them down.

Speed: Tissue fell slowest(lowest mass and large surface area acts as parachute)

Plastic spoon fell pretty quick

And the stainless steel spoon fell the fastest because of the weight and small mass

The tissue is the only item out of the 3 that makes 0 noise when it hits a surface.

after receiving a stimus, the sensory receptors send(s) signals to the appropriate area of the body.  

the must be sensory neurons.  

hope its .

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).