Biology 173 4/29/24

True or false: Immobile nutrients cannot be transported by the xylem or the phloem.

• True

• False

Answer explanation

Immobile nutrients can be transferred by the xylem, but not by the phloem. They can be transferred into the plant, but not dispersed throughout the plant.

Would you expect symptoms of iron deficiency to show up first in old or young leaves?

• Old

• Young

Which of the following are only macronutrients?

• Mg, Ca, H, O, P

• C, O, Ca, K , P

• C, H, O, N, K

• P, Al, Ca, C, O

Which of the following will increase plant growth if supply/availability is increased?

• Limiting nutrient

• Essential nutrient

• Mobile nutrient

• Immobile nutrient

Answer explanation

Think: Limiting reagent for a chemical reaction

Which describes the relationship between plants and mycorrhizae?

• Parasitic

• Mutualistic

• Competitive

Plants are nutritional...

• Conformers

• Regulators

Which type of organism is most accurate to this graph?

• Invertebrate

• Vertebrate

A plant has begun to develop chlorosis on the underside of its leaves, which has developed first on older leaves. The new leaves are small and branching has reduced. What type of deficiency is this plant likely facing?

• Nitrogen

• Potassium

• Calcium

• Phosphorus

Rank the relative importance of N-fixing activities.

• lightning > crops > industrial fixation > fossil fuels > natural fixation

• fossil fuels > natural fixation > lightning > industrial fixation > crops

• natural fixation > industrial fixation > crops > fossil fuels > lightning

• None of the answers are correct.

Rhizobium is an example of

• (a) Symbiosis

• (b) Parasites

• (c) Insectivorous

• (d) none of these