Males of many species of duck have very ritualized mating displays. The pattern

Question

Males of many species of duck have very ritualized mating displays. The pattern and movements of their mating display provide a-

a species-specific communication signal to females of their species.

b communication signal to offspring from previous years.

c. communication signal to other males that they are better mates.

d. communication signal that evolved from their ancestors.

Evaporation from the Earth's surface is determined by all of the following EXCEPT:

a. altitude

b. wind c. precipitation d.solar radiation e.soil acidity

a species-specific communication signal to females of their species.

b communication signal to offspring from previous years.

c. communication signal to other males that they are better mates.

d. communication signal that evolved from their ancestors.

Evaporation from the Earth's surface is determined by all of the following EXCEPT:

a. altitude

b. wind c. precipitation d.solar radiation e.soil acidity

Explanation / Answer

1) Communication signal that evolved from their ancestors - The courtship display of ducks involve variously stretching the neck and uttering a single or multiple whistle. The relative display frequencies and vocalizations, varies within species and can also be seen in other species such as North American waterfowl.

2) Soil acidity - Soil acidity depends on the mineral composition of the soil. Hence cannot be used to determine evaporation.

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