Exam 28: Plant Nutrition and Transport

In leaves,excess sugar molecules may enter companion cells of phloem through ________.  

The Casparian strip prevents water from diffusing through the ____.  

The generally accepted explanation for the movement of organic compounds in phloem is ____.  

Respond to the following statements with reference to the five plant macronutrients listed below. -This nutrient is an important component of proteins and nucleic acids.

The pitted end walls of sieve elements are called ____.  

The stomata open depending on the following conditions,except ____.  

Filaments of a fungus that form a velvety cloak around roots or penetrate their cells aiding in the mutualistic relationship between the plant and fungus are called ____.  

The elements required in amounts above 0.5 percent of a plant's dry weight are known as:  

Poor farming practices,such as plowing land straight up and down a hill,led to the formation of the Providence Canyon in Georgia in a process called _____.  

Which type of soil has the best oxygen and water penetration to support plant growth?  

An opening in leaves that functions in the exchange of gases is called a ____.  

Unlike vessel elements,____________ have no perforation plates.

What is the function of companion cells?  

In the endodermis,what structure allows the ions in water to enter or exit a cell?  

Respond to the following statements with reference to the five plant micronutrients listed below. -This nutrient plays an important role in cell wall formation.

Figure 28.12 - Refers to the accompanying figure illustrating transport in phloem.Letter ____ can indicate a fruit or developing root cells.  

Choose the most appropriate answer response for each question. -cuticle

Choose the most appropriate answer response for each question. -vessel elements

Nitrogen-fixing bacteria receive _______ from the plant in a mutually beneficial relationship.

Sieve tubes are different from vessel elements because they ____.