Which is an example of class evidence?

a. the scientist excludes a suspect from a crime investigation after analyzing fingerprints on the murder weapon and those of the suspect.

b. the scientist reports that kerosene from acme organic products was the accelerant used in an arson.

c. the scientist establishes that the dna from an assault suspect was found on the victim.

d. the scientist matches the toolmark on a broken door in a burglary with a toolmark made from a crowbar in a suspect's car.

Many state and local authorities are making laws regarding recreation on lakes, rivers, and oceans to reduce water pollution. why would lawmakers need to consult with scientists before making these laws? a) to make scientists feel important b) so that the laws reduce pollution by a sufficient amount c) so that parks and lakefront facilities will still make large profits d) so that the public will believe that the laws are important to follow

Mineral rich water heated by newly found oceanic crust escapes through cracks in the ocean floor called

Ascientist is investigating the effects of salinity on fish development. he places fertilized fish eggs in an aquarium that contains low salinity and observes their development. what factor would improve experimental design the most? place the fish eggs in the open ocean because that is the natural habitat include another aquarium that has normal salinity to compare to the low salinity aquarium include an aquarium that replaces salt with sugar to confirm that the effects are specific to salt grow algae with the fish eggs in order to provide adequate nutrients to the developing embryos