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Cosmos: Some of the Things That Molecules Do (Season 1, Episode 2)
Terms in this set (25)
Humans, over thousands of years, created dogs from wolves through a process known as __________.
Artificial selection involves humans encouraging certain _________ through selective breeding, cross-pollinating, or selective planting.
Native Americans in Central America selectively bred and planted teosinte grass for thousands of years and turned it into modern __________.
Every dog of every breed is basically a domesticated __________.
DNA stands for __________.
DNA is shaped like a long twisted ladder, or a double __________.
DNA is located in what part of each cell?
The DNA double helix is a molecular machine made of about 100 billion __________.
When a living cell divides in two (mitosis), each one takes away with it a complete copy of the __________.
The occasional error made when copying DNA during cell division is known as a (an) __________.
Most mutations are harmless, a few are deadly, and a very few confer a (an) ______________.
Advantageous __________ tend to spread through populations because the carriers are more likely to reproduce.
Individuals don't __________, populations do over time.
__________ - the basic unit of the classification of organisms.
__________ wrote the book On the Origin of Species, which is considered the foundational work of evolutionary biology.
The spread of advantageous mutations through a population is known as __________.
The only way (currently) for two people to have the same DNA is to be __________.
All known organisms have __________. (Setting aside viruses, which may not really be alive!)
The more closely related two __________ are, the more DNA they tend to share.
__________ is when a species completely dies out.
There have been five known mass _________ events in Earth's geologic history.
The last mass extinction event about 65 million years ago wiped out almost all
The tardigrade, also known as a __________, survived all five mass extinction events.
__________ is Saturn's largest moon.
Some scientists think it may be possible for __________ to exist in Titan's seas of methane and ethane.
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