Multiple Choice
Nitrogen enters the roots of plants in a process called:
93
views
35. Soil
Nitrogen Fixation
Multiple Choice
Legumes (members of the pea family) have roots with swellings called nodules that __________.
A
form fungal hyphae
B
provide a steady supply of sugar to the host plant
C
produce antibiotics that protect the plant from soil bacteria
D
increase the surface area for water uptake
E
contain nitrogen-fixing bacteria
Verified step by step guidance1
Understand the role of nodules in legumes: Nodules are specialized structures found on the roots of leguminous plants. They are crucial for the symbiotic relationship between the plant and nitrogen-fixing bacteria.
Identify the function of nitrogen-fixing bacteria: These bacteria, often from the genus Rhizobium, convert atmospheric nitrogen (N₂) into ammonia (NH₃), a form of nitrogen that plants can use for growth.
Recognize the importance of nitrogen fixation: Nitrogen is a vital nutrient for plants, necessary for the synthesis of proteins, nucleic acids, and other cellular constituents. However, most plants cannot directly utilize atmospheric nitrogen.
Clarify why other options are incorrect: The nodules do not form fungal hyphae, provide sugar, produce antibiotics, or increase water uptake surface area. Their primary function is to house nitrogen-fixing bacteria.
Conclude with the correct function: The nodules in legumes are essential for housing nitrogen-fixing bacteria, which help convert atmospheric nitrogen into a usable form for the plant, enhancing its growth and development.
Related Videos
Related Practice
