Determine the hardness of each unknown mineral from the data given. Deep scratch by fluorite.

A)greater than 4
B)4
C)must be 1, 2, or 3

In what layer of the sun is energy transfers between atoms

3points hurry! what is the relationship between biotechnology, sharkskin, and disease resistance? bioengineers have developed an artificial sharkskin that does not allow resistant bacteria to grow on it. disease-causing microbes have been genetically modified to keep them from infecting the skins of sharks. scientists have created a device that can be attached to the skins of sharks that dramatically increases their abilities to resist disease. sharkskin produces many chemicals that can be collected and used to create antibiotics.

What organelle other than the nucleus houses dna in a eukaryotic cell?