1.) How do nitrogen-fixing microbes first become associated with their symbiotic

ID: 192826 • Letter: 1

Question

1.) How do nitrogen-fixing microbes first become associated with their symbiotic plants?

a.) They are carried in the seed.

b.) They move into the vascular system and multiply.

c.) They move in via openings in the plant cell walls.

d.) They enter via modified root hairs.

e.) They enter root nodules previously produced by the plant.

2.) The part of the root that is most important for building the bulk of a root nodule is the

a.) epidermis

b.) cortex

c.) xylem

d.) phloem

e.) root hair

3.) If you were going to try to get non-legumes to nodulate for the nutritional benefit of the plants, which part of the plants would you work on?

a.) roots

b.) stems

c.) leaves

d.) flowers

e.) petioles

1.) d . They enter via modified root hairs. and then initiate root nodule formation.
2.)b.) cortex
3.) a . roots

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