Help please 1. Define mutualise and smbiosis. Briefly describe the 2 types of mu
ID: 187114 • Letter: H
Question
Help please1. Define mutualise and smbiosis. Briefly describe the 2 types of mutualistic symbioses that are critical to plant nutrition. What are the costs and benefits to cach partner in these interactions? 2. Describe 1 example of a symbiotic nutualism between a plant and a nitrogen- fixing bacteri um 3. Diagram the global P cycle. What processes are particularly important to determining P availability to plants? What geological conditions cause P to be particularly scarce? 4. Define mycorhizae. What is the difference between ectomycorhizae and endomycorhizae? Which is more common? 5. Would you expect symptoms of iron deficiency to show up first in old or young leaves? 6. Name and describe the 5 microbial transformations of nitrogen. For each what chemical form of nitrogen is the input and what chemical form is the output? Which one makes N biologically available? Which one returns N to the atmosphere? For each of these transformations, how does it benefit the microbes involved? 8. How bave people modified the global nitrogen cycle? 9. Why does absorption of nutrients through plant roots require enersy? 10. Define each of the following: essential nutrient, macronutrient micronutrient, limiting nutrient, mobile nutrient, immobile nutrient, substitutable resources 11. Explain the statement "Plants are nutritional conformers while animals are nutritional regulators. What plant cell structure/s allows nutrient content to vary among individual plants of the same species? How do these differences in the physiology of plants and animals affect animals that directly feed on plants?
Explanation / Answer
1. Symbiosis is a close and biological relationship between two different species. It may be mutualistic, commensalistic, or parasitic relationship. It involves two species living in close proximity. Symbiotic relationships are sometimes, but not always, mutualistic.
Mutualism is a way which connects the two organisms of different species and the way each individual benefits from the activity of the other. It plays a key part in ecology.
Mutualistic symbiosis regarding plant nutrients with their cost and benifit
a) Fungus live in the roots of plants. Roots provide shelter and food to the fungus while fungus provides important nutrients to the plants in return.
b) Plants require nitrogen for its growth. Nitrogen is available in the atmosphere, but plants are not capable to absorb nitrogen in gaseous form. Rhizobium bacteria can absorb nitrogen from the atmosphere and provides to plants. As rhizobium cannot make its food, it provides nitrogen to the legumes and in return legumes provide them food and shelter.
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