Severe acute respiratory syndrome (sars) is caused by sars-associated coronavirus (sars-cov).  the diagram shows the structure of sars-cov.

sars emerged as an infectious human disease in 2002.  several years of research have led to the conclusion that sars-cov originated in a single colony of bats.  these bats served as a reservoir for a form of the virus which could not infect humans.  sars-cov is hypothesized to have mutated in such a way that it gained the ability to infect humans.
in what way are the glycoproteins on sars-cov involved in its ability to infect humans?
  a. 
the glycoproteins the virus travel in the air so it can spread among humans.
  b. 
the glycoproteins interact with a human cell's dna replication machinery so the virus can replicate.
  c. 
the glycoproteins the virus move around the human respiratory tract so it can damage the lungs.
  d. 
the glycoproteins interact with receptors on a human cell so the virus can enter the cell.

Most smaller stars don't have a radiative zone.

The answer to your question really depends on three things: how much water you have, how cold it is to start out, and how cold the things around it are. water actually freezes when it gets to 32 degrees fahrenheit (0 degrees celsius), but the time it takes to get there may be different.  let's start with the first. if you take two glasses, and fill one with a tiny bit of water, and the other about halfway, then put them both in the freezer, the one with less water will freeze first (you can try this at home, but i recommend using plastic cups and not glass ones).  now let's move on to the second part. let's say you have two glasses, and you fill one with really cold water that has been in the refrigerator, and the other with really hot water from the sink. if you put both of them in the freezer, the one that started out colder will freeze first.  for the third part, let's imagine that you have two glasses with the same amount of water in them, and the water is at the same temperature. imagine putting one outside on a really really cold day in georgia, and having a friend in alaska put one outside on the same day. since it would be so much colder in alaska, the glass of water there would freeze before yours.  so, if you took a tiny bit of really cold water in a glass, and put it outside on a cold day in alaska, it would freeze a lot faster than a big glass of hot water outside on a cold day in georgia.