Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 38.2, Problem 2EQ
Summary Introduction
To identify: The potential sentinel plants that were starting to experience a deficiency of phosphorous.
Introduction: John Hammond and his colleagues identified the SQD1 gene which can be used to monitor phosphorous level in plants. SQD1 optimize plant phosphorus requirement by making the plant respond to low levels of phosphorous requirements.
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A) What do the results suggest about the part of the plant that regulates the thickness of developing leaves in response to light:
a) developing leaves
b) mature leaves
c) whole plant
B) Which treatment had leaves with the lowest surface area to volume ratios at a leaf size of 20mm:
a) high apex treatmetn
b) high whole treatment
c) low apex treatment
d) they all have same surface area to volume ratio
C) Which leaf will lose water more readily under dry conditions?
a) high apex
b) high whole
c) low apex
d) they will all lose water at the same rate
D) In what ways would the differences in leaf form evident between the High Whole and Low Whole treatments at the end of the experiment reflect adaptations to their different growth environments? Discuss specifically with respect to the effects of leaf form on photosynthetic rates and rates of water loss.
LAB 5: SALINIZATION OF SOIL
Why was it necessary in the experimental design to have some seeds germinating in pure water?
5b)Discuss the need to pretreat the plant tissues used before cryopreserving them in ultra-low temperature and the advantages of cryopreservation compared to conventional plant conservation methods.
Chapter 38 Solutions
Biology
Ch. 38.1 - Prob. 1CCCh. 38.1 - Prob. 2CCCh. 38.2 - Prob. 1CCCh. 38.2 - How might soil crusts influence the ecology and...Ch. 38.2 - Prob. 3CCCh. 38.2 - Prob. 1EQCh. 38.2 - Prob. 2EQCh. 38.3 - Prob. 1CSCh. 38.3 - Prob. 2CSCh. 38 - Which of the following substances can limit plant...
Ch. 38 - In what form do plants take up most soil minerals?...Ch. 38 - Prob. 3TYCh. 38 - Soil organic matter provides the benefit of a....Ch. 38 - Prob. 5TYCh. 38 - Which property is not characteristic of clay-rich...Ch. 38 - Prob. 7TYCh. 38 - Prob. 8TYCh. 38 - Prob. 9TYCh. 38 - Which plant uses a passive trap to obtain animal...Ch. 38 - Prob. 1CQCh. 38 - Prob. 2CQCh. 38 - Prob. 3CQCh. 38 - Prob. 1COQCh. 38 - Prob. 2COQ
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- B) Describe the mechanisms employed by two types of plants to minimize photorespiration and ensure that the CC is carried out even when environmental conditions are not in their favor. Be sure to identify 1) the type of plant, 2) its natural environment and how it affects the plant's ability to perform the CC, and 3) how it has adapted itself to minimize photorespiration. 4arrow_forward1) Consider the two titles below, both relating to the same experiment: • "Environmental controls of transpiration" • "Humidity decreases, while light increases, transpiration rate of Phaseolus plants" Which of the two titles is more effective? What makes that title more effective than the other option?arrow_forwardRoundup herbicide works through inhibiting the synthesis of the aromatic amino acids tyrosine, tryptophan, and phenylalanine in plants. a) Explain why it generally takes at least 7 days for the herbicidal effect of Roundup to be observed. b) Propose a different mechanism by which another herbicidal compound might act more quickly.arrow_forward
- Why is BHIB commonly used in culturing root canal specimen?arrow_forwardYour scheduled patrolling of com field has collected various leaves samples with symptoms stated as below. Use these symptoms to explain about the type of nutrient deficiency to your worker. (i) Burning of leaf tip and edge. (ii) Reddish purple leaf edge on lower leaves. (iii) Interveinal chlorosis. (iv) Wrinkled and unopened leaf. (v) Some of the nutrient deficiency symptoms were ohserved on new growth but some were observed at the lower leaves. How would you explain this phenomenon to your worker? (vi) What are the field guides to distinguish between biotic and abiotic causes of leaf abnormalities?arrow_forwardAcclimatization has been one of the major obstacles to the use of tissue culture in crop improvement. Explain why this process is necessary for the ex vivo survival of tissue culture derived plants.arrow_forward
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