John Tyler
John Tyler
John Tylerwas the tenth President of the United States. He was also, briefly, the tenth vice president, elected to that office on the 1840 Whig ticket with William Henry Harrison. Tyler became president after Harrison's death in April 1841, only a month after the start of the new administration. Known to that point as a supporter of states' rights, which endeared him to his fellow Virginians, his actions as president showed that he was willing to back nationalist policies as...
NationalityAmerican
ProfessionPresident
Date of Birth29 March 1790
CountryUnited States of America
John Tyler quotes about
I can never consent to being dictated to.
So far as it depends on the course of this government, our relations of good will and friendship will be sedulously cultivated with all nations.
The United States have adventured upon a great and noble experiment, which is believed to have been hazarded in the absence of all previous precedent - that of total separation of Church and State. No religious establishment by law exists among us. The conscience is left free from all restraint and each is permitted to worship his Maker after his own judgement.
Popularity, I have always thought, may aptly be compared to a coquette-the more you woo her, the more apt is she to elude your embrace.
I contend that the strongest of all governments is that which is most free.
Wealth can only be accumulated by the earnings of industry and the savings of frugality.
There are good reasons why natural selection has become widely accepted as an explanation of evolutionary development. When applied to mammals and other large animals, it fits perfectly. But we cannot assume that all evolutionary steps arise from selection, particularly when looking at smaller animals.
It is hard to explain the huge variety of diatoms - a microorganism that has 100,000 species - in terms of natural selection.
My prime interests are in evolution and development. I use the cellular slime molds as a tool to seek an understanding of those twin disciplines.
The reason for natural selection's great success is that it provides a satisfying explanation of how evolution might have occurred: individual organisms vary, and if those variations are inherited, the successful ones will survive and propagate and pass down their desirable traits to succeeding generations.
When, as an undergraduate, I began experiments on these slime molds in 1940, only one other person, Kenneth Raper, was working on them at that time. In fact, he discovered the model species Dictyostelium discoideum, which is the species used in the majority of the experimental work today.
The sudden appearance of mushrooms after a summer rain is one of the more impressive spectacles of the plant world.
Changes in size are not a consequence of changes in shape, but the reverse: changes in size often require changes in shape. To put it another way, size is a supreme regulator of all matters biological. No living entity can evolve or develop without taking size into consideration. Much more than that, size is a prime mover in evolution.
In the seventeenth century, it was held by some that inside a human sperm there was a minute human being - a homunculus - that was planted inside the womb. Development consisted of the miniature homunculus enlarging and passing through birth and on to maturity-just like inflating a balloon.