Theory of spontaneous generation - origin of life, PL-SQL Programming

THEORY OF SPONTANEOUS GENERATION - ABIOGENESIS OR AUTOGENESIS -

  1. According to this theory, the existing living communities have originated from non-living organic matter without the intervention of living entities, i.e., abiogenetically.
  2. The various concepts regarding the origin of life due to spontaneous generation are as follow:
  3. Anaximander (611-547 B.C.) stated that plants and animals were formed from inorganic substances.
  4. Epicurus (342-271 B.C.) had the opinion that the origin of worms and other animals from the soil or decomposed faecal matters of animals due to the warmth of the solar system and air present in the atmosphere.
  5. Aristotle (384-322 B.C.) said that not only worms and insects but also fishes, amphibians and mice have emerged spontaneously.
  6. Aristotle believed hierarchial increase of complexity as shown in "Scala naturae"
  7. Non-living → plants → sponge → animals
  8. Once formed organism start reproducing themselves.
  9. Van Helmont (1642) was the opinion that human sweat and wheat bran when kept together in dark cupboard for 20 days can form mice.
Posted Date: 10/8/2012 8:33:06 AM | Location : United States







Related Discussions:- Theory of spontaneous generation - origin of life, Assignment Help, Ask Question on Theory of spontaneous generation - origin of life, Get Answer, Expert's Help, Theory of spontaneous generation - origin of life Discussions

Write discussion on Theory of spontaneous generation - origin of life
Your posts are moderated
Related Questions
Use of COUNT in SQL It describes and discusses various general methods of expressing constraints, eventually noting that support for "=" with relation operands is sufficient f

Keyword and Parameter Description: table_reference: This specifies a table or view that should be accessible when you execute the DELETE statement, and for that you must

set serveroutput on declare a number(5); b number(5); c number(5); begin a:=&a; b:=&b; c:=a/b; dbms_output.put_line(c); exception when zero_divide then d

Iteration Schemes The bounds of a loop range can be variables, literals, variables, or expressions but must compute to integers. Below are some of the examples. As you can see t

FOR-LOOP While the number of iterations through a WHILE loop is unknown till the loop completes, then the number of iterations through a FOR loop is known before the loop is ent

Varrays versus Nested Tables The Nested tables are differing from varrays in the following ways: 1)  Varrays have a maximum size, while nested tables do not. 2)  Varrays are

Bitmap Join Indexes - This feature will increase the performance and detains the size and format of your databases in data Character Semantics and Globalization -This featur

Name Resolution   During the compilation, the PL/SQL compiler relates identifiers like the name of a variable with an address or memory location, actual value, or datatype. Th

Use the NOCOPY Compiler Hint By default, the OUT and IN OUT parameters are passed by the value i.e. the value of an IN OUT actual parameter is copied into the corresponding fo

Using RENAME in combination with JOIN - SQL Example gives pairs of ids of students having the same name, by joining two renamings of IS_CALLED. Example gives an equivalent ex