Answer:
Structures that are still present but currently serve little to no purpose
Explanation:
<em>Vestigial structures/organs are general defined as structures/organs that are present but poorly developed without any functional use in the present living organisms but thought to have been fully developed and functional in their ancestors.</em>
Fully developed and functional organs gradually become less developed and non-functional across generations as the environment keeps changing and organisms found lesser use for the organs. An example includes the <u>caudal vertebrae</u> found in man which is kind of useless but thought to have been fully developed and functional in the ancestors of man - the monkeys.
<u>Vestigial organs are often used as one of the morphological evidence of the evolution of living organisms.</u>
<span>The division of the fur trade was mostly the
spark of the Pequot war. The Pequot war is a conflict between the Pequot tribe and the alliances that the European
colonists have made in Massachusetts Bay, Plymouth, and Saybrook colonies and
their native tribe alliance with the Mohegan tribes. <span>
<span>It was a
dispute that the Pequots lost; where about an approximate of 700 of these
tribesmen were either killed or sent to slavery. Access to the control of fur
trade divided the two tribes when they both decided to realign with English
trade sources. The Pequots made an alliance with the Dutch, while the Mohegan
made an alliance with the English. </span></span></span>
The two are potassium and rubidium. Why? Na is an alkali metal. As you go down the metals become more reactive.
Calcium has 20 protons. Why? The atomic # is 20 (the one at the top).
It has 20 neutrons. Why? The atomic mass (the number on the bottom) is ~40, ignoring electron mass. 40- 20 protons = 20 neutrons.
It has 20 electrons.
Why? The # of protons and electrons is the same. Ions aren't on the periodic table.
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