The half-life for DNA decay is 521 years. What does it mean?

A. Half of the organisms used to live for 521 years.

B. Scientists can only find DNA for the last 1042 years.

C. Half the DNA bonds breakdown over 521 years.

D. Scientists can only study organisms that lived 521 years ago or longer.

i think it should be C.

Explanation:

But a study published this week (October 10) in the Proceedings of the Royal Society B estimates that DNA from bone has a half-life of 521 years: after that amount of time, half of the nucleotide bonds that hold it together are broken, and after another 521 years, those bonds are cut in half again, and so on.

just go with your heart buddy

starchy vegetables are high in carbohydrates.

starchy vegetables contain more carbohydrates than non-starchy vegetables.

explanation:

there are two primary categories of carbohydrates, essentially differentiated on the basis of their carbohydrate content (which is in the form of starch - a complex carbohydrate):

those vegetables which contain little amounts of starch are termed as non-starchy vegetables, and some examples include: artichokes, broccoli and bean sprouts.

vegetables high in their starch content are distinguished as starchy vegetables, and some examples include: potatoes, chickpeas and corn.