Concept explainers
To explain: The agricultural value of research to understand the control of root hair development.
Introduction: Roots and stems of plants are produced with secondary growth. Gymnosperms and woody eudicots have primary growth at apical meristem and at lateral meristem, the secondary growth occurs. The secondary tissue is produced as a result of the activity of two lateral meristems, namely the cork cambium and vascular cambium.
To explain: The agricultural value of the interactions leading to the mycorrhizal association.
Introduction: Roots and stems of plants are produced with secondary growth. Gymnosperms and woody eudicots have primary growth at apical meristem and at lateral meristem, the secondary growth occurs. The secondary tissue is produced as a result of the activity of two lateral meristems, namely the cork cambium and vascular cambium.
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Chapter 36 Solutions
Biology (MindTap Course List)
- A group of researchers run an experiment to determine the effect of mycorrhizae (a fungus) on plant growth. The researchers set up three experimental groups: A large amount of mycorrhizae is applied to the plants in group 1 a smaller amount of mycorrhizae is applied to the plants in group 2, and no mycorrhizae is applied to the plants in group 3. Which group(s) is/are the experimental group(s)? More than one answer may be correct. Select all that apply. O Group 3 Group 2 Group 1arrow_forwardShooting is preferred to regenerate first than rooting. Why?arrow_forwardThe specific relationship between a legume and its mutualisticRhizobium strain probably depends on(A) each legume having a chemical dialogue with a fungus.(B) each Rhizobium strain having a form of nitrogenase thatworks only in the appropriate legume host.(C) each legume being found where the soil has only theRhizobium specific to that legume.(D) specific recognition between chemical signals and signalreceptors of the Rhizobium strain and legume species.arrow_forward
- Which of the following is an adaptation thatenhances the uptake of water and minerals byroots?(A) mycorrhizae(B) pumping through plasmodesmata(C) active uptake by vessel elements(D) rhythmic contractions by cells in the root cortexarrow_forwardHow can tissue culture techniques be used to study the effects of environmental factors, such as temperature, humidity, and light intensity, on the growth and development of plant cells and tissues, and how can this knowledge be applied to improve crop yields and plant resistance to abiotic stress?arrow_forwardHow do mycorrhizae improve the growth of trees?In what way(s) are the root nodule and mycorrhizalsymbioses similar? In what major way do they differ?arrow_forward
- Plant stem cells such as those found in cambium tissues are able to -fight microbial invaders by becoming mobile and phagocytic. -produce nutrients for other cells. -remain undifferentiated but divide to produce cells that differentiate into new tissues. -exist as mature cells.arrow_forwardwhat type of stem modification does: -Pistia stratiotes-Calotropis gigantea-Gloriosa superba-Ficus benghalensis have?arrow_forwardAn experiment is conducted to determine the effect of classical music on the growth rate of marigolds (flowers). Two groups of plants are grown from seed in identical soil types, exposed to identical light conditions, and given the same nutrients. Group A is in a quiet atmosphere. The plants in group B provided with the same atmosphere, except that classical music is played for twelve hours daily in this area. The scientist measures the plants in both groups each day and records the data. In experimental design, Group A is known as.* experimental group control group non-experimental group O quasi-experimental grouparrow_forward
- Scientists observe that the roots of legumes grow around nitrogen- fixing bacteria capable of forming nodules. Discuss how the roots might recognize these bacteria (see Fig. 20.17).arrow_forwardIn a practice known as crop rotation, farmers alternate a crop of legumes (plants like beans, whose roots bear nodules containing Rhizobium) with a crop of non- legumes. What is the benefit of this practice?arrow_forwardWhich of the following explains why pea plants in high soil nitrogen conditions have so few rhizobial nodules on their roots? When there is already high soil nitrogen there is a very large cost to having rhizobial nodules. The rhizobia bacteria in the nodules fix nitrogen when there isn't enough in the soil, so when there is already high soil nitrogen there is no advantage for the pea plant to expend the extra energy housing the rhizobia. The rhizobia bacteria in the nodules use nitrogen when there isn't enough in the soil, so in conditions of high soil nitrogen the plant tries to exclude the rhizobia to keep the nitrogen for itself. When there is already high soil nitrogen there is no benefit to the plant to having rhizobial nodules, which can rob the plant of the high nitrogen supplies so that the rhizobia bacteria do not have to fix the nitrogen themselves.arrow_forward
- Biology (MindTap Course List)BiologyISBN:9781337392938Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. BergPublisher:Cengage Learning