Mendel And His Peas

The Believes Of Islam

Byzantine Empire

The Cardiovascular System

THE CARDIOVASCULAR SYSTEM

Answers ;

1) Contractions of the heart pump blood throughout the body. Valves ensure that blood flows in only one direction.

2) Parts of the cardiovascular system include the heart , three types of blood vessels , and blood

.

3) They both occur if the heart doesn't get enough blood .

4) valves make sure the blood flow only one direction

How the Ancient Agathis tree spread across the Earth.

In South America scientist have found fossils of a tree that is over 52 million years old. Before this, fossils of this tree were only found in Australia where it still live today. These trees have soft wood, thick trunk, and can grow to 200 ft. These fossils date back to when Antartica, Australia, Africa, and South America were a part of Gondwana . In ancient times the ancient trees grew across all of Gondwana. It is possible that dry weather in South America made it impossible for them to keep growing. It also possible that they could not grow in Antartica because of cold weather. Although the tree has survived from ancient times, it is possible that it will not be able to respond to human threats such as logging and deforestation.

Boston Tea Party

The Boston Tea Party (initially referred to by John Adams as "the Destruction of the Tea in Boston") was a political protest by the Sons of Liberty in Boston, on December 16, 1773. Disguised as American Indians, the demonstrators hurt no one but destroyed the entire supply of tea sent by the East India Company in defiance of the American boycott of tea carrying a tax the Americans had not authorized. They boarded the ships and threw the chests of tea into Boston Harbor, ruining the tea. The British government responded harshly and the episode escalated into the American Revolution. The Tea Party became an iconic event of American history, and other political protests such as the Tea Party movement after 2010 explicitly refer to it.

Independence Hall

Independence Hall is the centerpiece of Independence National Historical Park in Philadelphia, Pennsylvania, United States, on Chestnut Street between 5th and 6th streets.