AP BIOLOGY

Detailed explanation-1: -The chances of any event can be shown on a probability scale from 0 to 1. Unlikely events are closer to 0 and likely events are closer to 1.

Detailed explanation-2: -The probability of an event which is very unlikely to happen is closest to zero and from the given options 0.0001 is closest to zero.

Detailed explanation-3: -Definition: Probability is a numerical measure between 0 and 1 (0%-100%) that describes the likelihood that an event will occur. Probabilities closer to 0 indicate that an event is less likely to occur. Probabilities closer to 1 indicate that the event is more likely to occur.

Detailed explanation-4: -Probabilities are given values between 0 and 1. A probability of 0 means that the event is impossible, while a probability of 1 means that it is certain. The closer the probability of an event is to 1, the more likely it is to happen. The closer the probability of an event is to 0, the less likely it is to happen.

Detailed explanation-5: -An event with a probability of zero [P(E) = 0] will never occur (an impossible event). An event with a probability of one [P(E) = 1] means the event must occur (a certain event). An event with a probability of 0.5 [P(E) = 0.5] is sometimes called a fifty-fifty chance event or an even chance event.