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Ch. 37 - Soil and Plant Nutrition
All textbooksCampbell 12th EditionCh. 37 - Soil and Plant NutritionProblem 9
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Chapter 37, Problem 9

The specific relationship between a legume and its mutualistic Rhizobium strain probably depends on a. each legume having a chemical dialogue with a fungus. b. each Rhizobium strain having a form of nitrogenase that works only in the appropriate legume host. c. each legume being found where the soil has only the Rhizobium specific to that legume. d. specific recognition between chemical signals and signal receptors of the Rhizobium strain and legume species.

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Hello everyone. And in today's video, we have the following problem in a mutual ist IQ relationship between lagoons and rise obeah. What will be the benefit gained by the lagoons in exchange for carbohydrates and the protection they give to the right's obeah and one should know before we jump into the answer choices, recall what the right's obeah is and it's nothing more than a mutual stick or a symbiotic bacterium and it's a nitrogen fixing type of bacteria. So this bacteria is able to take eun usable nitrogen and turn it into usable nitrogen by the lagoons. And these relationship means that these lagoons are going to be gaining usable nitrogen from these rides obeah and looking at our answer choices. The only answer choice that directly describes this relationship is going to be answer choice C that right's obeah give usable nitrogen to Della gums. And so that is going to be how this relationship works so that you give usable nitrogen in exchange for carbohydrate and protection from the lagoons. And that's going to be your final answer. Thank you very much for sticking around until the end of this video. I really hope it helped you and I hope to see you on the next one.
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Textbook Question

A mineral deficiency is likely to affect older leaves more than younger leaves if a. the mineral is a micronutrient. b. the mineral is very mobile within the plant. c. the mineral is required for chlorophyll synthesis. d. the mineral is a macronutrient.

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Textbook Question

The greatest difference in health between two groups of plants of the same species, one group with mycorrhizae and one group without mycorrhizae, would be in an environment a. where nitrogen-fixing bacteria are abundant. b. that has soil with poor drainage. c. that has hot summers and cold winters. d. in which the soil is relatively deficient in mineral nutrients.

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Textbook Question

Two groups of tomatoes were grown under laboratory conditions, one with humus added to the soil and one a control without humus. The leaves of the plants grown without humus were yellowish (less green) compared with those of the plants grown in humus-enriched soil. The best explanation is that a. the healthy plants used the food in the decomposing leaves of the humus for energy to make chlorophyll. b. the humus made the soil more loosely packed, so water penetrated more easily to the roots. c. the humus contained minerals such as magnesium and iron needed for the synthesis of chlorophyll. d. the heat released by the decomposing leaves of the humus caused more rapid growth and chlorophyll synthesis.

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Textbook Question

DRAW IT Draw a simple sketch of cation exchange, showing a root hair, a soil particle with anions, and a hydrogen ion displacing a mineral cation.

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