What led to a population increase during the Song dynasty in China?
The one child policy was lifted at the end of the Tang dynasty
Buddhist monks were allowed to marry which led to increased family size.
A new form of rice was introduced that was drought resistant and yielded
two crops a year.
Crops from the New World including the potato were introduced which led
to longer life expectancy rates.
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Unit 1. The

Fill in the blanks using the following choices: resource,population,specialization,evolution,selection species diversity,the number and relative abundance of species present in a community,is affected by competition, which results in partitioning and

For review 1. in terms of which government is sovereign, differentiate among a unitary system, a confed- eral system, and a federal system of government. 2. to which level of government does the constitution distribute the enumerated po implied powers? concurrent powers? reserved powers? provide several power. 3. what matters fall within the scope of state sovereignty? differentiate among dual federalism, cooperative federalism, centralized federalism, and conflicted federalism. how does the national government use grants-in-aid, mandates, and preemption to direct the policy of state and local governments? 6. what do we mean by intergovernmental relations? why is the term a good description of u.s. federalism today? 7. list several advantages and several disadvantages of a federal system.

Only people in ap world history can can someone give me a question and a statement to present to the class about chapter 15,16,or17