A change in the allele frequency of a population as a result of chance events rather than natural selection.
This person was influential in the fields of political economy and demography.
A trait that helps an organism survive and reproduce
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Fossils are the preserved remains or traces of animals, plants, and other organisms from the remote past.
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Ability of an organism to survive and reproduce in its environment
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Ability of an animal to look like another more harmful animal
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It refers to the situation where different species may live in the same area, but properties of individuals prevent them from interbreeding
Breeding organisms with specific traits in order to produce offspring with identical traits.
A process in which individuals that have certain inherited traits tend to survive and reproduce at higher rates than other individuals because of those traits.
It us the diversification of a group of organisms into forms filling different ecological niches.
This person was a Scottish geologist, physician, chemical manufacturer, naturalist, and experimental agriculturalist.
Remnant of a structure that may have had an important function in a species' ancestors, but has no clear function in the modern species.
Down
Structures in different species that are similar because of common ancestry.
The sequence of events involved in the evolutionary development of a species or taxonomic group of organisms
A structural adaptation that enables an organism to blend in with its environment
This person (1744-1829) stated the principle of use and disuse: the idea that parts of the body that are used extensively become larger and stronger, while those that are not used deteriorate. He also stated principle of inheritance of acquired characteristics: an organism could pass modifications to its offspring. He was the first on to think about this.
It refers to a population of animals, plants, or other organisms that are separated from exchanging genetic material with other organisms of the same species.
It refers to a population of animals, plants, or other organisms that are separated from exchanging genetic material with other organisms of the same species.
Process by which unrelated organisms independently evolve similarities when adapting to similar environments
Structures that do not have a common evolutionary origin but are similar in function
This person was born in 1809 and died in 1832. He wrote "On the Origin of Species by means of Natural Selection." He went on a 5 year trip on the HMS Beagle.
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There is a 'Make Printable' button on the top left of your puzzle that will let you sign up for a plan or purchase a single puzzle.
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It looks weird when printed.
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99% of other printing issues have to do with printer settings. Instead of trying to fiddle with printer settings, which can be time-consuming and frustrating, there are a couple workarounds you can try.
You can try printing from a different browser, since different browsers have different default print settings. Alternately, you can try saving as a PDF (next to the print icon) and print that.
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Not all my words are in my puzzle.
When you hit the 'Arrange' button, our algorithm will try to arrange all your words on the grid, and will move words around to try to fit the most words.
This will get all the words on the grid about 90% of the time, depending on the word list. For the other 10%, you will get an alert explaining that the words that did not fit were added to the scratchpad.
It prints on two pages.
Big puzzles won’t always print on one page — the clues and grid are the smallest we could make them while keeping them readable for everyone.
That said, different browsers print in slightly different ways, so you could try using 'print preview' using a different browser (or try the PDF button) to see if you like how that looks better.
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