Exam 37: Plant Nutrition and Soils

In acidic soils or in habitats subjected to prolonged acid rain,what element is often released from rocks that is toxic to many plants?

Most parasitic plants like other land plants have mycorrhizal symbionts.

Plants can remove harmful chemicals from the soil by the process of

The habitats most favorable for the growth of legumes in symbiosis with nitrogen-fixing bacteria are

Certain plants have been genetically modified to secrete citrate,which helps

During the initiation of nitrogen-fixation nodules,the Rhizobium bacteria release what type of molecules to signal the host plant?

Mycorrhizae are especially effective in helping plant roots uptake

During the initiation of nitrogen-fixation nodules,how do the Rhizobium bacteria enter into the cortex of the root?

When plants are grown in hydroponic culture,their roots are suspended in an aerated solution.Why is the solution aerated? Check all that apply.

Why is it beneficial to plants that soil particles have negatively-charged surfaces?

Natural communities recycle nutrients,but cultivated communities often require an input of mineral nutrients due to losses through

Carnivorous plants evolved because which of the following nutrients is often extremely limited in their habitats?

A primary advantage of using integrated nutrient management compared to inorganic chemical fertilizers is that

Insectivorous plants such as the Venus flytrap,pitcher plant,and bladderworts often grow in

A deficiency in a plant micronutrient

A soil sample with a OH^- concentration of 10^-9 M may also have high levels of aluminum.

Which of the following statements about plant macronutrients is/are true? Check all that apply.

Why do nitrogen-fixation nodules contain large amounts of leghemoglobin?

Humus often enhances the water and nutrient-retaining properties of topsoil.Which of the following might increase the humus content of a soil? Check all that apply.

A parasitic plant without chlorophyll is likely to lack leaves.