The Most Likely Models of the Planet Mercury Indicate That

question 10

Multiple Choice

The most likely models of the planet Mercury indicate that more than half the planet may be composed of:

• A) water
• B) metals
• C) ammonia and methane ice
• D) very light and porous rocks
• E) the element mercury

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Definitions:

Axillary Bud

Bud located in the axil of a leaf.

Bud Scale

A small protective covering over a bud that shields it from the elements and pathogens.

Casparian Strip

Layer of impermeable lignin and suberin bordering four sides of root endodermal cells; prevents water and solute transport between adjacent cells.

Vascular Cylinder

In eudicots, the tissues in the middle of a root, consisting of the pericycle and vascular tissues.