Crossword Puzzle for Early
Theories of Evolution
2. A group of islands in the Eastern
Pacific Ocean that have plant and
animal species found nowhere else
in the world. It was there that
Charles Darwin began to really
comprehend what causes evolution
6. A Central European monk who
carried out plant breeding
experiments between 1856 and 1863.
He discovered that there is a
recombination of parental traits
10. An 18th century Swedish botanist
who developed a system for
classifying all living things.
This system, which is named after
him, is still in use today by the
11. In 1858, he sent Charles Darwin a
draft of an essay he had written
on natural selection. This
pressured Darwin to quickly finish
his own book on natural selection.
12. A 17th century archbishop of
Armagh Ireland who calculated
that the earth began on Monday,
October 23, 4004 B.C.
13. An 18th century French Scientist
who said that living things change
through time and that the earth
must be much older than 6000
years. He hid his views in a 44
volume natural history book series.
14. He wrote "Essay on the
Principles of Population."
This said that human populations
will double every 25 years unless
they are kept in check by limits
in food supply.
15. A term for the largest natural
population of organisms that can
potentially interbreed to produce
16. The theory that living things were
divinely created and exist in an
infinite and continuous series of
forms, each one grading into the
next, from simple to complex.
(Hint: you are looking for four
1. He believed that evolution is due
to the "inheritance of
uniformitarianism and an opponent
of catastrophism. His 3 volume
geology textbook was important in
helping Charles Darwin develop his
ideas about evolution.
2. A group of closely related
species. The category immediately
3. He was a strong advocate of
4. The process by which one species
evolves into two or more species.
It occurs as a result of different
reproductively isolated from each
other, usually by adapting to
different environments. (Hint:
you are looking for two words)
5. The evolutionary process primarily
responsible for the change over
generations in wing and body
coloration of "peppered"
moths living near English
industrial cities during the 19th
and 20th centuries. (Hint: you
are looking for two words)
7. The theory that the earth’s
surface is the result of violent
and sudden natural catastrophes
such as great floods rather than
8. Genetic change in a population or
species of organisms that occurs
9. He wrote "On The Origin of
13. The convention established by
Linnaeus whereby genus and species
names are used to classify
species. (Hint: the term that you
are looking for means “two names”
Copyright © 2005 by Dennis
O'Neil. All rights reserved.