Respuesta :
The correct answers in the order are:
a) Rhizobia release a chemical, causing an infection thread to form.
b)respond to rhizobia signals and produce infection thread.
c) infection thread grows into the cortex of the root.
d) extend the infection thread into the cortex.
e) Infection thread releases rhizobia inside cortex cells.
f) allow the infection thread to rupture.
g) Nodule forms from rapidly dividing cortex cells.
h) cause cortex cells to divide rapidly upon contact with rhizobia
Scientists are working to develop non-legume crop plants, such corn, wheat, and rice, into symbiotic partnerships that resemble the one between a legume and rhizobium. But it has turned out that this is a really challenging undertaking. Plant genes that allow the nodule to react to the bacteria in the proper way must be produced at every stage of nodule formation. A non-legume plant would need to be genetically designed with the proper genes and then express those genes at precisely the appropriate time for it to have a symbiotic relationship with rhizobia. You will learn about the stages of nodule formation in the legume-Rhizobium connection through this activity. The formation of root knobs on both vegetables and non-vegetables is one of the most direct and effective methods for nitrogen addiction. Rhizobia release a mixture, which causes a string of contamination to form. response to rhizobia signals and disease string production. The cortex of the root develops with disease string. Cortex-widen the contaminated string. Rhizobia are released by contamination thread inside cortical cells. Allow the contaminated string to splinter. Cortical cells that have separated fast into knob formations. Cause cortical cells to swiftly divide when they come into touch with rhizobia.
The complete question is:
Scientists are trying to engineer non-legume crop plants, such as corn, wheat, and rice, to form symbiotic relationships similar to the legume-rhizobium relationship. but this has proven to be a very difficult task. at each step of nodule formation, plant genes must be expressed that enable the plant to respond appropriately to the bacteria. for a non-legume plant to form a symbiotic relationship with rhizobia, it would need to be engineered with the right genes and then express those genes at exactly the right time. in this activity, you will identify the steps of nodule formation in the legume-rhizobium relationship. in addition, you will indicate what the products of genes added to a non-legume plant would need to do in order to carry out each step. the flowchart below illustrates the steps involved in root nodule formation. the first step has been filled in to get you started. complete the rest of the chart. first, drag labels to targets of group
1, indicating what happens at each step. then, drag labels to targets of group
2, indicating the plant gene functions that must be active at each step. not all labels will be used.
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