There Are Several Species of Grain Beetles That Live on Dry

question 25

Multiple Choice

There are several species of grain beetles that live on dry meal and do considerable damage to stored grain.In an experiment,a dozen jars of dry meal are set up and fifty individuals of each species,both males and females,are added to each jar.The food supply is not quite sufficient to last for six months and the size of the jar is adequate so that wastes do not become toxic.Most likely,examination of the jars in six months will find

• A)a totally random variation in numbers of both beetles.
• B)only one species per jar.
• C)the same ratio of beetles as when you started (about half from each species).
• D)only dead beetles in all jars due to intense competition for the niche.

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Definitions:

Scoria Cone

A relatively small type of volcano that is cone shaped and mostly composed of scoria; synonymous with cinder cone.

Volcanic Dome

A dome-shaped volcanic feature, largely composed of solidified lava of felsic to intermediate composition.

Caldera

A large volcanic depression that is typically circular to elongate in shape and formed by collapse of a magma chamber.

Volcanic Mudflow

A rapid flow of volcanic ash mixed with water, often melting snow or glaciers, that moves down the slopes of a volcano, also known as a lahar.