84.798 is the mass number
Studies of populations that reveal correlations between dietary habits and disease incidence are epidemiological studies.
Answer: Option A.
Polar ice cap in Antarctica.
Explanation:
Scientist drill ice cores from inside the polar ice cap in Antarctica to study variability of climate and differentiate that variability From global climate change. Each layer of the ice tells about weather and what the Earth was like when the first snow fell.
For example, Le grande says that as snow deposits into a growing glacier, the temperature of the air imprints on water molecules.
Icy layers hold particles,aerosols, sea salts, trace elements that were in the atmosphere before and they abide for thousands of years and provide evidence of past events.
The 1st one is plasma membrane because it is the outside
the 2nd one is the cytoplasm because it is the middle part
the 3rd one is the nucleus because it is the center
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