What can cause changes in dna senqences?

a- gene flow
b- proteins
c- mutations
d- genetic drift

What would be the result if crossing over did not happen during meiosis in humans? a. there would be less genetic variation in humans. b. parents would be more likely to look like their children. c. the human population could not reproduce. d. children would have more chromosomes.

The idea of spontaneous generation was disproved by in a experiment involving jars of meat

Wich level of organization includes all the other levels or organizations