Soybeans Will Have Several Hundred Rhizobium Nodules Per Plant and May

question 23

Multiple Choice

Soybeans will have several hundred Rhizobium nodules per plant and may divert 20-30 percent of its energy generated by photosynthesis to the nodule instead of to other plant functions when the nodule is actively fixing nitrogen.Which of the following best describes Rhizobium?

• A) antagonistic virus that invades the root
• B) mutualistic bacterium that penetrates the root
• C) parasitic plant that invades the root
• D) multicellular mycelium that invades the root
• E) decomposer soil fungus that invades the root

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Definitions:

Monozygotic Twins

Identical twins originating from a single fertilized egg, resulting in genetically identical individuals.

Genes

Units of DNA that are responsible for determining the characteristics and traits that are inherited from parents to offspring.

Chromosome

A structure within the cell nucleus made up of DNA and proteins that contains the genetic material of an organism.

Alleles

Variants of a gene that occur at the same place on a chromosome, contributing to the diversity of genetically influenced traits.