Fragment, Run-On, or Complete Sentence?
The NASA rover has been roaming across the surface of Mars for more than 10 years.
Complete
To begin the process of bioprinting an organ; doctors typically start with a patient’s own cells.
Semicolon incorrect
While they are known for towering over other breeds, Great Danes are prone to quite a few health conditions and tend to have a shorter life span than other dogs.
Correct = Fragment , Complete Sentence
Let's go to the library; there are 15 different books I'd like to take out.
Correct
Changing her thinking doesn’t mean that intrusive thoughts about food and diet completely go away.
Complete
Before reintroducing the wildlife: the reserve had to remove and relocate more than 3,000 Zulu cattle roaming free range on the property.
Colon does not work here grammatically
A visit to The City Museum's exhibit on the origins of photography, provided an inspiring start to the class.
Incorrect - Interrupting Comma
There is mounting evidence of global warming; of course, some people will never believe it.
Correct
A multiday adventure through lush rainforest that is unforgettable as it is challenging.
Today, YouTube is one of the most popular social media networks worldwide, second only to Facebook; and it’s estimated that more than 2.5 billion monthly users collectively watch more than 1 billion hours of videos each day.
no semicolon before a FANBOYS
Mosquitoes are found in various climates, they thrive in Alaska as well as in the tropics.
Incorrect - Comma Splice
When it is filtered, water is cleaner, and it tastes better.
Correct - introductory clause and two independent clauses.
Ride a snowmobile or take a husky ride across the monochrome snowscape.
Complete Sentence
When divers – weighed down by a rock, had collected around 20 oysters, they would tug on a rope to be pulled back up to the surface by a siyub (rope hauler).
Non-essential punctuation doesn't match
River otter populations have declined since the 1600s for numerous reasons, including the fur trade and loss of habitat.
Correct
The USA has a very large land area: Canada is even larger.
Incorrect - structurally, it works, but the relationship between the two clauses does not work with the colon.
The last full moon was two days ago and it still appears bright and large in the sky.
Westminster Abbey -- where the ceremony will take place -- describes the chair as "one of the most precious and famous pieces of furniture in the world," and says it is in "remarkable condition" given its age.
No comma before "and"
Mr. Finklestein, who assigns more papers than he has time to grade, keeps student essays half a semester, before returning them.
Incorrect - don't put a comma before a preposition!
Many people have opted to ride bicycles, or walk to work because road construction has hindered travel around town.
Incorrect - no comma before "or"