Iron Deficiency Is Often Indicated by Yellowing in Newly Formed

question 79

Multiple Choice

Iron deficiency is often indicated by yellowing in newly formed leaves. This suggests that iron

• A) is a relatively immobile nutrient in plants.
• B) is tied up in formed chlorophyll molecules.
• C) is concentrated in the xylem of older leaves.
• D) is concentrated in the phloem of older leaves.

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Definitions:

Mid-ocean Ridge

An underwater mountain range, formed by plate tectonics, that encircles the globe and is the site of seafloor spreading.

Oceanic Trench

A deep, narrow depression in the ocean floor, often formed by the subduction of one tectonic plate beneath another.

Ocean-continent Convergent

A tectonic boundary where an oceanic plate collides with a continental plate, often forming mountain ranges.

Continental Rift

A low trough or series of troughs bounded by normal faults, especially where two parts of a continent begin to rift apart.