Which three investigations will provide evidence to support what they have learned?

measuring how close a soda can must be before it rolls toward a balloon that has been rubbed on someone's hair
counting the number of staples that are directly attached to a strong magnet
dropping a rubber ball from a distance of 1.5 meters above the classroom floor
placing a magnet against a jar containing a mixture of iron filings and sand
measuring how far a toy car travels across the floor before coming to a stop

answer: land bridge theory. land bridge theory held that shifting portions of dry land explained the finding of identical species on different continents. plate tectonic theory eventually eliminated the land bridge theory.

the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation:

we need additional information in order to determine the cause of death for anna garcia. there are at least 3 things with explanation included as to why we need them are as follows: