19
Scientists discover a new species of bacteria that has a similar genetic makeup as a previously studied bacterial species.
Which investigative tool should be used to genetically compare the new bacteria to the previously studied bacteria?
1 gene therapy
2 chi-squared test
3 gel electrophoresis
4 electron microscope

CAN CONFIRM THAT

GEL ELECTROPHORESIS

IS THE CORRECT ANSWER

Explanation:

just took the test

sheep is a herbivore animal whereas grasshopper belongs to the class chordates but both of them feed on greens.  

if grasshopper and sheep feeding on a pasture land, i do not think both of them will have any impact on each other. however, the number of the species can make difference. since sheep feed on greens, there is a possibility there left no pasture land for the grasshoppers or they may get extinct.

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.