As You Are Watching Dairy Cattle Grazing in a Field

question 61

Multiple Choice

As you are watching dairy cattle grazing in a field you notice a flock of starlings following them and eating insects that were disturbed by the cattles' hooves. Name the kind of species interaction you have observed and the benefit, if any.

• A)Mutualism; birds and cattle benefit.
• B)Commensalism; birds benefit and cattle are unaffected.
• C)Predation; birds benefit and cattle don't.
• D)Competition; birds benefit and cattle are disturbed.
• E)Consumption; both benefit from obtaining food.

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Definitions:

Probability Tree

A diagram that shows the possible outcomes of a series of related probabilities.

Bayes' Law

A theorem describing the probability of an event based on prior knowledge of conditions that might be related to the event.

P(A|B)

The probability of event A occurring, given that event B has already occurred.

P(B|A)P(A)

Represents the probability of event B given event A has occurred, multiplied by the probability of event A; used in the calculation of joint probabilities.