Which phrase describes one characteristic of radioactive elements? What is the age of a meteorite if potassium-40 decayed from 80 g to 10 g? The half-life of potassium-40 is 1.3 billion years.

In this case, the statement that people who exercise for an hour may have lower cholesterol levels is .

How does an angiosperm prevent self pollination

Abiologist counts the number of rabbits in a population each year and observes a decrease in population. since the coyote population has exploded, the biologist concludes that the coyote population has had a negative interaction with the rabbit population. which describes the biologist’s actions? a.) experimentationb.) inferencec.) observationd.) interacting