Scientists now use cross fertilization.
Mary's behavior is an example of learned helplessness, that is a behaviour pattern of a subject that endures repeatedly aversive, violent or traumatic stimuli and becomes unable to escape or avoid them. The subject has a tendency to not accept escape or avoidance as an option in the future.
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.
The filibuster is the right to unlimited debate a bill.
This leads to the abbility of the minorities to do an ever debating process con a bill they don´t feel like passing. Though this could be used wrong, it also assures that every bill that passes is well thought and well discussed. THe large parties with majority at senate have considered in the past making a move on removing the filibuster with no success yet.
Answer: 1. morrill land-grand act of 1862 2. the pendelton act
Explanation: 1. the morrill land-grant act gave public land to states and territories for the use of schools and universities. this is very important because we need access to education. 2. the pendelton act prevented people with federal jobs from being hired or fired based on political affiliations or ties to politicians, federal jobs now are based on merit.