Exam 35: Plant Nutrition

Before a fungus enters a root to form a mycorrhiza, the root forms a _______ in response to fungal signals.

Which mineral is a constituent of all proteins and nucleic acids?

The part of the root that is most important early in the formation of a root nodule is the

The total process by which nitrogen is passed through the various parts of the biosphere is called the _______ cycle.

The industrial process for the production of inorganic nitrogen fertilizer is called the

In the oceans and in fresh water, _______ are the main type of bacteria that fix nitrogen.

Ammonia is converted to nitrate by

Haustoria are structures of some

Which list contains an element that is not essential for plant nutrition?

Which statement about arbuscular mycorrhizae is false?

Mineral nutrients are primarily absorbed directly from the

A newly discovered species of earthworm is found to spend most of its time in the C horizon.This is unusual, since other species tend to stay mostly in the

Why might a farmer choose to add organic fertilizers (as opposed to inorganic fertilizers) to their farm soils?

Nodules that are actively fixing nitrogen are pink, demonstrating the presence of

Which element is obtained directly by plants from both the soil and the atmosphere?

Animals must obtain reduced nitrogenous compounds from plants because they themselves cannot _______ nitrogen.

Organic fertilizers directly improve the plant nutritional contents of

The industrial production of nitrogen-containing fertilizer is currently limited by

Holoparasitic plants have lost many of the morphological and genetic traits necessary for an autotrophic lifestyle.From an evolutionary point of view, how do you think this happened?

Hydroponically grown plants are ones that have had their roots grow and develop in