Campbell Biology in Focus (2nd Edition)
2nd Edition
ISBN: 9780321962751
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Textbook Question
Chapter 29, Problem 7TYU
Two groups of tomatoes were grown in the laboratory, one with humus added to the soil and the other 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 for this difference is that
- A. the healthy plants used carbohydrates 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.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
The image here shows the growth rate for Chlamydomonas as a function of temperature.
Which of the following reasons could explain why Chlamydomonas can't grow at 40°C?
10
15
20
25
30
35
40
Growth Temperature (*C)
A. The rate of molecular motion is too high at 40°C to sustain life.
B. The turnover time of rubisco is too fast.
O C. The glycolysis enzyme hexokinase loses its tertiary structure.
D. The desaturase enzyme DesA, is not expressed.
Reset Selection
Growth Rate
(divisions/day)
Briefly explain why the 14C/12C ratio will decrease after the death of plants. A three- to four-sentence explanation is needed.
Five sweetener samples (labelled A to E) were tested by 97 individuals for the intensity of their sweetness. The ranking was done with #1 as the least sweet and #5 as the sweetest.
Sugars
Counts
1
2
4
A
14
42
7
В
2
59
23
9
23
59
2
63
16
9
5
93
v What is the identity of sweetener sample "A"?
A. Sucralose
v What is the identity of sweetener sample "B"?
B. Sucrose
v What is the identity of sweetener sample "C"?
C. Aspartame
v What is the identity of sweetener sample "D"?
D. Lactose
What is the identity of sweetener sample "E"?
E. Glucose
Chapter 29 Solutions
Campbell Biology in Focus (2nd Edition)
Ch. 29.1 - Why is long-distance transport important for...Ch. 29.1 - Prob. 2CCCh. 29.1 - WHAT IF? Some plants can detect increased levels...Ch. 29.2 - If a plant cell immersed in distilled water has a...Ch. 29.2 - How would a reduction in the number of aquaporin...Ch. 29.2 - WHAT IF? What would happen if you put plant...Ch. 29.3 - Prob. 1CCCh. 29.3 - WHAT IF? If an element increases the growth rate...Ch. 29.3 - Prob. 3CCCh. 29.4 - Prob. 1CC
Ch. 29.4 - Prob. 2CCCh. 29.4 - Prob. 3CCCh. 29.5 - A scientist adds a water-soluble inhibitor of...Ch. 29.5 - WHAT IF? Suppose an Arabidopsis mutant lacking...Ch. 29.5 - Prob. 3CCCh. 29.6 - Prob. 1CCCh. 29.6 - WHAT IF? If you buy cut flowers, why might the...Ch. 29.6 - Prob. 3CCCh. 29.7 - Prob. 1CCCh. 29.7 - Prob. 2CCCh. 29.7 - Prob. 3CCCh. 29 - Which structure or compartment is part of the...Ch. 29 - Prob. 2TYUCh. 29 - Prob. 3TYUCh. 29 - What would enhance water uptake by a plant cell?...Ch. 29 - Prob. 5TYUCh. 29 - Compared with a cell with few aquaporin proteins...Ch. 29 - Two groups of tomatoes were grown in the...Ch. 29 - Prob. 8TYUCh. 29 - Prob. 9TYUCh. 29 - SCIENTIFIC INQUIRY A Minnesota gardener notes that...Ch. 29 - Prob. 11TYUCh. 29 - FOCUS ON INTERACTIONS The soil in which plants...Ch. 29 - Prob. 13TYU
Additional Science Textbook Solutions
Find more solutions based on key concepts
8. Studies of DNA support which of the following?
a. Members of the group called australopiths were the first t...
Campbell Biology: Concepts & Connections (9th Edition)
You microscopically examine scrapings from a case of Acan-thamoeba keratitis. You expect to see a. nothing. b. ...
Microbiology: An Introduction
2 Of the uterus, small intestine, spinal cord, and heart, which is/are in the dorsal body cavity?
Anatomy & Physiology (6th Edition)
Why are BSL-4 suits pressurized? Why not just wear tough regular suits?
Microbiology with Diseases by Body System (4th Edition)
Define histology.
Fundamentals of Anatomy & Physiology (11th Edition)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- The label on Vodka says that it is 40% ABV (alcohol by volume). In comparison, red wine contains 10% ABV (alcohol by volume). From this information I can conclude that: a. the potatoes from which vodka is made contain more carbohydrates to produce alcohol than do wine grapes b. the yeast made to produce vodka must not be killed by concentrations of alcohol above 10-15% ABV c. the alcohol in vodka is concentrated by distillation after fermentation d. vodka is made by letting water evaporate after fermentation e. vodka has fewer calories in 1.5 oz serving than a 6 oz serving of wine.arrow_forwardIs Bt corn ethically acceptable or otherwise? Explain your conclusion.arrow_forward33) True or False: Plants undergo photosynthesis to make glucose using light energy. Plants also use cellular respiration to break down glucose and convert it into energy (stored as ATP). A) True B) Falsearrow_forward
- Please answer the following question : (a.) and (b.)arrow_forwardWe perform our measurements for KHP at 281 nm. Would we get the same results for pathlength at 250 nm? What about using chlorophyll at 667 nm? Why might a too high concentration of KHP give erroneous data for measuring pathlength?arrow_forwardc) Pasteurization is a technique that uses temperatures of about 72°C to neutralize potential pathogens in foods. a. Justify the effect does this temperature have on the enzymes and cellular metabolism of pathogens. b. Argue why does the heat of pasteurization kill some microorganisms yet fail to affect thermophiles?arrow_forward
- Given the chromatogram of the spinach leaves extract in a normal phase from the experiment you conducted, arrange the components from least polar to most polar. O Carotene, Xanthrophyll, Chlorophyll A, ChlorophyllI B O Chlorophyll B, Chlorophyll A, Carotene, Xanthrophyll O Chlorophyll A, Chlorophyll B, Xanthrophyll, Carotene O Carotene, Xanthrophyll, Chlorophyll B, Chlorophyll Aarrow_forwardAll plants contain chlorophyll a. In addition, many plants contain other types of chlorophylls and accessory pigments. Suppose a new agricultural technology is developed in which accessory pigments are somehow embedded or injected into crops that naturally have only chlorophyll a. Explain the food production advantage that these plants could hypothetically provide if they could utilize many of these pigments rather than just one type of chlorophyllarrow_forwardMatch the -troph term with the correct definition. (match each letter to the corresponding number) Each term applies to only 1 definition. A.chemotroph B. phototroph C. heterotroph D.heliotroph E. autotroph -------------------------------- 1.gets energy from chemical bonds 2.gets carbon from inorganic sources (carbon dioxide) 3.gets carbon from organic sources (other organisms) 4.gets energy from lightarrow_forward
- Throughout history, spices have been used as preservatives and to cover up the smell or taste of food that is slightly spoiled. The success of some spices led to a magical, ritualized use, and possession of spices was often limited to priests or other powerful members of the community. a. Choose a spice and trace its use geographically and historically. What is its common use today? b. Spices grow and tend to be used predominantly in warmer climates. Explainarrow_forwardChlorophyll- enriched products and supplements are now being soldin the market. Find out what benefits these products claim. With theknowledge about chlorophyll, are these claims are valid? Explain and support the answer.arrow_forwardSwitchgrass is used for ethanol production. The composition of the switchgrass is 37% cellulose, 24% xylan, 3% galactan, 4% arabinan, 20% lignin, 7% extractives, and 5% ash. A dilute acid pretreatment method is applied to the switchgrass before enzymatic hydrolysis and fermentation. The pretreatment hydrolyzes 10% hexosan and 90% pentosan into monomeric sugars. Approximately 30% of the hydrolyzed pentoses further react & are decomposed to furfural. Assume that there is no decomposition of the hydrolyzed hexoses. Further Assume that lignin, extractives, and ash do not change during the pretreatment. • How much of each lignocellulosic sugar (glucose, xylose, galactose, and arabinose) is produced when pretreating 1,000 kg (dry matter) switchgrass? How much furfural is formed? • Is water consumed or produced in these pretreatment hydrolysis and dehydration reactions? How much in each?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
How do Plants Handle Stress?; Author: Alex Dainis;https://www.youtube.com/watch?v=TYsnveEHqec;License: Standard Youtube License