Campbell Biology: Concepts & Connections (8th Edition)
8th Edition
ISBN: 9780321885326
Author: Jane B. Reece, Martha R. Taylor, Eric J. Simon, Jean L. Dickey, Kelly A. Hogan
Publisher: PEARSON
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Chapter 1, Problem 18TYK
The fruits of wild species of tomato are tiny compared with the giant beefsteak tomatoes available today. This difference in fruit size is almost entirely due to the larger number of cells in the domesticated fruits. Plant biologists have recently discovered genes that are responsible for controlling cell division in tomatoes. Why would such a discovery be important to producers of other kinds of fruits and vegetables? To the study of human development and disease? To our basic understanding of biology?
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Chapter 1 Solutions
Campbell Biology: Concepts & Connections (8th Edition)
Ch. 1 - Complete the following map organizing one of...Ch. 1 - 2. All the organisms on your campus make up
an...Ch. 1 - 3. Single-celled amoebas and bacteria are grouped...Ch. 1 - Prob. 4TYKCh. 1 - Prob. 5TYKCh. 1 - Prob. 6TYKCh. 1 - 7. The core idea that makes sense of all of...Ch. 1 - A biologist studying interactions among the...Ch. 1 - Which of the following best describes the logic of...Ch. 1 - 10. In an ecosystem, how is the movement of energy...
Ch. 1 - Explain the role of heritable variations in...Ch. 1 - Describe the process of scientific inquiry and...Ch. 1 - Contrast technology with science. Give an example...Ch. 1 - Prob. 14TYKCh. 1 - Explain what is meant by this statement: Natural...Ch. 1 - The graph below shows the results of an experiment...Ch. 1 - Prob. 17TYKCh. 1 - The fruits of wild species of tomato are tiny...
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- You are a developmental geneticist studying flowering time variation in Arabidopsis. You perform a mutagenesis screen to identify mutants in the photoperiod pathway. Given what you know about photoperiodism in Arabidopsis, what phenotype are you looking for and under what photoperiodic conditions would you perform the experiment? delayed flowering in long days delayed flowering in short days same flowering in short days early flowering in short days same flowering in long days early flowering in long daysarrow_forwardConsider the following hypothetical gene a plant g&T produces a protein that impacts the stem length. There are two alleles for GT which produces long stem and tea little tea which results in short stint. Which of the following genome types above would have a different pheno type? And what would the phenotype be for the genotype?arrow_forwardFruit scientists are trying to determine the role of the pectinase (p) gene in a plant’s ability to tolerate cold conditions. The table shows each of three possible fruit tree genotypes and the percentage of fruit produced at different temperature ranges. Which of the following statements best describes the evolutionary concept illustrated by this example? A. Homozygous genotypes increase fitness in a population. B. Hybrid plants are known to have a disadvantage over homozygous genotypes. C. Natural selection selects against the recessive gene and for the dominant gene. D. Certain phenotypic variations can significantly increase fitness of the organism in particular environments.arrow_forward
- Imagine a rocky slope in the Santa Ynez Mountains behind Santa Barbara that is covered purple sage (Salvia leucophylla) and white sage (Salvia apiana). Competition among plants is intense, and research has shown that individual plants compete for space via allelopathy. Imagine that some of the plants (the "mutants") experience a genetic mutation that renders the essential oils in their leaves much less volatile or much less abundant than the essential oils in the plants around them. The most likely outcome for these mutant plants is:arrow_forwardWhy the transfer to wild plants from crops of genes that provide pesticide and insecticide resistance may have evolutionary consequences? Explain.arrow_forwardAround 8,000 years ago wild potato's were being harvested by humans in South America. They were from warm regions of Peru, and had tiny tubers. In the 16th century, European's introduced these tiny potato's to Europe. Over time, larger potato varieties appeared. Today, many varieties exist, such as this Idaho potato. Recently, a gene for tuber size was discovered, larger size is related to variation in the gene pool (potato's growing in cooler areas show higher frequencies). Questions: What kind of selection was going on here, why would small tuber size be more common in the tropics, how does founder effect come into play here for our current larger potato varieties? Lastly, what is the point of a tuber in a plant? Original varieties of potato Idaho potatoarrow_forward
- An agriculture lab is trying to improve a type of tomato so that it produces large fruits even under very hot, dry conditions. To do this, they must first identify the genes responsible for the tomato's response to temperature and moisture. Which experimental approach would be most helpful in doing this?arrow_forwardA botanist wanted to see if a new strain of corn could germinate in soil that was too salty for regular corn. She conducted a study on the germination success of seeds from the new strain that were exposed to various levels of salty soil, from zero to normal (100mg/L) to high (200mg/L) to very high (400mg/L) to normally lethal (800mg/L). a.) Write a formal hypothesis for this study b.) Does her data support or reject the hypothesis? Explainarrow_forwardWhich of the following problems has/have been addressed through the development ofgenetically modified plants? 1. Vitamin deficiencies in children. 2. Susceptibility of crops to insect pests. 3 Accumulation of toxic ions in agricultural soils. 4. Both 1 and 2 are correct. 5. Women menstruation cycle.arrow_forward
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