The data shown above is a life table for the female Belding ground squirrel in the Sierra Nevada Mountains.
Calculate the mortality rate (per thousand) between the ages of 1-2.
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Which statements explains what the fossil records indicates? check all that apply. a) earth is 4.5 billion years old b) many organisms have become extinct c) mammals have always existed on earth d) mass extinctions have occurred several times on earth e) the amount of water on earth has decreased over time?