Amental image of average characteristics used to see if other objects match is the model. a. picture b. concept c. exemplar d. prototype

I’m stuck on this question cuz i’m stupid sksksksk

Amniocentesis is a process in which amniotic fluid is taken from the mother's womb to identify any genetic abnormalities in the fetus. how would the discovery of the human genome contribute to this process?

Adding more tributaries to a local river basin can have what effect?