Question

Which of the following describes the relationship of Mutualism?

• A. Only 1, 2 and 3
• B. Only 2, 3 and 4
• C. Only 2 and 4
• D. All of the above.

Answer 1

The correct option is D All of the above.

A mutualistic relationship is when two organisms of different species "work together," each benefiting from the relationship. In mycorrhizal associations between plant roots and fungi with the plant providing carbohydrates to the fungus in return for primarily phosphate but also nitrogenous compounds. Other examples include rhizobia bacteria that fix nitrogen for leguminous plants in return for energy-containing carbohydrates Pollination in which nectar or pollen (food resources) are traded for pollen dispersal (a service) or ant protection of aphids, where the aphids trade sugar-rich honeydew (a byproduct of their mode of feeding on plant sap) in return for defense against predators such as ladybugs. Zoochory is an example where animals disperse the seeds of plants. This is similar to pollination in that the plant produces food resources (for example, fleshy fruit, overabundance of seeds) for animals that disperse the seeds (service). The bacteria and the human. A certain kind of bacteria lives in the intestines of humans and many other animals. The human cannot digest all of the food that it eats. The bacteria eat the food that the human cannot digest and partially digest it, allowing the human to finish the job. The bacteria benefit by getting food, and the human benefits by being able to digest the food it eats