Should pay attention in class
Answer: D. advanced technology in irrigation to create agricultural surpluses
Explanation:
There is no map so I do not know which river valley civilization you speak of but I found the options for this question with the answer above being the most likely answer.
The question most probably alludes to the Indus River Valley Civilization which is one of the oldest civilizations to ever exist in the human world.
They had quite a high population for the time and so came up with various technological advances to cater for their people including sewage and water systems.
It was their work with irrigation that earned them high praise however. They came up with advanced irrigation techniques which ensured that agriculture boomed and created enough food to feed the population.
Answer:
Selected option: binary fission
Explanation:
Bacteria reproduce asexually, usually by binary fission, also known as bipartition. This process consists of a stem cell giving rise to two genetically identical cells, but smaller in size. First the circular bacterial DNA is duplicated with the help of DNA polymerase, and then a transverse wall is formed by internal growth of the plasma membrane and the cell wall. Some species of bacteria, after dividing, hold daughter cells together through membranes. This characteristic allows the formation of bacterial colonies, which greatly facilitate their identification, since each species that forms these groups does so in a special way: in a single one-dimensional row, in two dimensions, in clusters, etc. Binary fission happens very fast. Ideally, some bacteria divide at 20 minute intervals. At that rate, if there is no interference, a bacterium would give rise to more than a billion bacteria in 10 hours. However, bacteria cannot reproduce at this speed for long, because soon the lack of food or the accumulation of waste products would prevent it.
