Answer:
Taking more samples from different parts of an acre.
Explanation:
Validity and accuracy of the data is crucial for any serious research. In this particular case, the most accurate data would be obtained if earthworms would be counted on the whole acre. Of course, this would consume lot of time, people, money etc. That's why methods for estimation are used. Estimation best works with large number of samples. Since one acre equals over 4000 square meters, taking only five samples from such a big area is simply not enough for obtaining valid data.
One of the possible ways to improve estimation is to take more samples per acre while avoiding taking adjacent samples because it could be possible that number of earthworms in one part of an acre is increased (or decreased) for any reason, which would lead us to wrong conclusion.
States enjoyed greater autonomy under the Articles, whereas the Constitution granted some powers to the states.
<h3>What is articles of confederation?</h3>
- The 13 founding states of the United States of America came to an agreement known as the Articles of Confederation and Perpetual Union, which functioned as the country's first system of governance.
- On November 15, 1777, the Second Continental Congress approved it following lengthy discussion and forwarded it to the states for ratification.
- In the Articles of Confederation, which served as the nation's first constitution, the confederacy of the former 13 colonies was referred to as "The United States of America."
- The 13 articles that made up the Articles of Confederation granted authority to a federal government headed by Congress.
- Following the United States' declaration of independence from Great Britain, the national government's functions were codified in the Articles of Confederation.
- The Continental Congress approved the Articles of Confederation on November 15, 1777.
- This text functioned as the first constitution of the United States.
- It lasted from March 1, 1781, until the current Constitution took effect in 1789.
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When stem cells grown on hard, rigid surface, then they became bone cells. Researchers demonstrate in Nature materials that human mesenchymal stem cells grown on a rigid substrate for some time become biased toward differentiating into bone-cell lineage, whereas cell grown on softer surfaces are just likely to eventually follow a bone or fat cell fate.
The correct answer is: Layer 1, layer 2, and layer 4 in all three regions.
The index fossils are fossils that are commonly used for identifying a geological period of time, and these fossils are also very wide spread, as well as having a rapid evolutionary trends.
By this picture, we can easily see that even though we have rock strata from different regions, the same layers contain the same fossil, and it is a fossil that also is rapidly evolving so has a minor change in each layer.
B) The atria only recieve blood and the Ventricles have to pump the blood
