A second home is a residence that you intend to occupy in addition to a primary residence for part of the year. Typically, a second home is used as a vacation home, though it could also be a property that you visit on a regular basis, such as a condo in a city where you frequently conduct business. Often, to qualify for a second-home loan, the property must be located in a resort or vacation area (such as the mountains or near the ocean) or a certain distance from the borrower's primary residence.
The primary function of the Calvin cycle is to synthesize simple sugars from Carbon Dioxide.
This doesn't mean the Calvin cycle only occurs in the dark -- it just doesn't require energy from light for the reactions to occur. The primary function of the Calvin cycle is carbon fixation, which is making simple sugars from carbon dioxide and water.