Nearly all organisms share ____ indicating that biochemistry might support evolution.
The fossil record is ____ and is an indirect evidence of evolution.
Any variation that aids an organism's chances of survival in its environment is ____.
The percentage of any specific allele in the gene pool
Physiological adaptations can occur over ____ periods of time.
Any individual or species with a multiple of the normal set of chromosomes
One mechanism for genetic change is environmental, such as radiation.
Alternative forms of a gene for a particular trait
Darwin practiced this type of breeding with his pigeons.
____ selection occurs when natural selection favors one of the extreme variations of a trait.
"A change in the gene pool of a population over time" is a definition for ____.
Occurs when members of similar populations no longer interbreed
Down
A population in which the frequency of alleles remains the same over generations
A mechanism for change in populations
Structural features with a common evolutionary origin are ____.
All the members of a species that live in an area
Polyploid speciation takes ____ generation(s).
The outward expression of genetic make-up.
____ isolation occurs when formerly interbreeding organisms can no longer mate and produce fertile offspring.
____ selection favors average individuals in a population.
____ evolution is when species that once were similar diverge, becoming increasingly distinct.
____ isolation occurs when a physical barrier divides a population.
Structural features that do not have a common evolutionary origin but are similar in function are ____.
Structural adaptations arise over ____ periods of time.
A kind of structural adaptation that enables one species to resemble another species.
Developed Theory of Evolution by Natural Selection
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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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Once you publish your puzzle, you can click the print icon or use your browser’s print function.
It looks weird when printed.
First make sure you’ve published your puzzle. See the 'How do I print?' section above for more information.
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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We invested in building a number of premium features that free sites are unable to offer: the ability to automatically or manually add words to your puzzle, save-as-you-go puzzle editing, the ability to access your puzzles from any computer, an uncluttered and ad-free interface, the ability for friends and colleagues to solve your puzzles online, and quick responsiveness to reported issues.
My Crossword Maker is the lowest-price service we've found that provides these features, and is designed for people who are not satisfied with what free sites are able to provide.
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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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Check your spam folder, and be aware that some school email systems block emails from non-school email addresses. Try providing a different email address if you think our emails to you are being blocked.
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