My Crossword Maker Logo
Powered by BrightSprout
Save Status:
or to save your progress. The page will not refresh.
Controls:
SPACEBAR SWITCHES TYPING DIRECTION
Answer Key:
Edit a Copy:
Make Your Own:
Crossword Word Search Worksheet
Rate This Puzzle:
Log in or sign up to rate this puzzle.

Scientists: Genetics, Origin of Life, Evolution

Across
In 1809, he proposed that species change through time, but could not say how long it would take - sometimes associated with giraffes
Traveled on the HMS Beagle and studied populations around the world - published the Origin of Species in 1859
Proposed in 1795 that Earth was shaped by gradual forces
Disproved the theory of spontaneous generation by studying microbial growth in sealed and unsealed flasks containing broth
Disproved the theory of spontaneous generation using crooked neck flasks containing broth to study microbial growth
Proposed that Earth's early atmosphere was made up of gases and simple organic compounds like methane
Proposed the theory of endosymbiosis
Used the term ribozyme to characterize RNA that could act as a catalyst
Studied the appearance of maggots on rotting meat in covered and uncovered dishes
Down
In 1738, he published a system of species classification - he developed binomial nomenclature
His work on genetics as used to show how variation was inherited, and from this an understanding of genes developed.
Produced fossil bones as evidence of evolution, but thought that fossils were caused by catastrophes in 1796
Studied microspheres and coacervates
Tested the formation of organic compounds in the lab using gases, water and electric sparks
Proposed the theory of uniformitarianism in 1830
Argued in 1798 that human populations always increase more quickly than food supply
A contemporary of Darwin - he wrote to him in 1858 about his theory of natural selection - did not publish before Darwin