HELP What Did Scientists Study?
Scientists in one study believed the modern plague and the plague of the 1300s are both
caused by the same bacterium: Yersinia pestis (Y. pestis). They suspected, though, that there
are variants of Y. pestis. There is probably one that caused the very serious plague years
ago and one that causes the less serious plague today.
In the study, the researchers looked at the DNA of Y. pestis from the 1300s and the DNA of Y.
pestis from today. They hoped to discover any differences. Some people carrying Y. pestis
died nearly 800 years ago. Still, researchers could get some DNA from their bones and teeth.
They were able to test the bones and teeth of 100 people who died from the disease in the
1300s.
The researchers did not find any different kinds of Y. pestis. They were disappointed. They
had hoped to find out why the Black Death was so serious.
Researchers plan to continue to look at the DNA of Y. pestis. Understanding ancient
pathogens is important, they say. Doctors might be able to predict the next deadly plague. If
so, they may be more ready to deal with it.

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

the correct answer should be false

{apex}

it has to be understood that the sea water contains a huge amount of sodium and chlorine ions and if they enter the cell of the atlantic cod fish, the cell will shrivel and the fish will die. to avoid such a condition, the fish uses active transport for the purpose of removing the ions against the gradient.

explanation:

the atlantic cod is not a maritime osmoconformer. its native application of salts is less than that of the seawater it lives in. it is continually falling water from the gills to the ocean via osmosis.

countering that, the fish is going to be swallowing seawater. but since its internal collection of salts is lower than seawater, the fish will want to go free of excess salt, and since that's going upon a gradient, then active transport, requiring energy, must be used to pump out the salt. much marine fish use the organs to filter out the salt and these fish discharge very straight urine.

i dont know it at allnow im just getting points at this pint