Consider the following statements regarding limiting nutrients. Select True or False for each statement.
T/F Nitrogen (N), phosphorus (P), and potassium (K) are common examples.
T/F Their presence limits the availability of micronutrients.
T/F Their availability tends to limit plant growth.
T/F Certain macronutrients and micronutrients can be considered limiting nutrients.

The inorganic nutrient most often lacking in crops is:

a. Carbon

b. Nitrogen

c. Phosphorus

d. Potassium.

Micronutrients are needed in very small amounts because

a. Most of them are mobile in the plant

b. Most serve mainly as cofactors of enzymes

c. Most are supplied in large enough quantities in seeds

d. They play only a minor role in the growth and health of the plant

Where is the start codon located?

a. At the start (5′ end) of the mRNA

b. In the DNA just upstream of where transcription starts

c. At the downstream end of the 5′ untranslated region (UTR)

d. At the upstream end of the 3′ untranslated region (UTR)

Plants require the smallest amount of which of the following nutrients?

a. Oxygen

b. Phosphorus

c. Carbon

d. Iron

Where does most nutrient uptake occur in roots?

a. At the root cap, where root tissue first encounters soil away from the zone of nutrient depletion

b. At the Casparian strip, where ions must enter the symplast before entering xylem cells

c. In the symplastic and apoplastic pathways

d. In root hairs, in the zone of maturation