Scientists are using a control sample that is known to be from bighead carp in an eDNA surveillance study. What purpose does this control serve?

A. It is a negative control that identifies what other species are

present in the area.

B. It is a negative control to show if there are bighead carp present in

the area.

C. It is a positive control to show if there are bighead carp present in

the area.

O D. It is a positive control that identifies what other species are

present in the area.

organisms are more likely to be more preserved in mud than sand because mud is moist and wet, while sand is very dry.

"you start with 15.67 g mgco3-xh2o, when heated and all the water is removed, you are left with 7.58 g mgco3 only.

therefore, you had 15.67 - 7.58 = 8.09g h2o  

moles of each :

7.58g mgco3 = ? moles = 7.58g / 83.4g/mole = 0.09moles  

8 09g h2o = ? moles = 8.09g / 18g/mole = 0.44moles  

molar ratio between the two by dividing both numbers by the smallest number :

0.09 / 0.09 = 1  

0.44 / 0.09 = 4.8  

mgco3-5h2o"