Campbell Essential Biology with Physiology (6th Edition)
6th Edition
ISBN: 9780134711751
Author: Eric J. Simon, Jean L. Dickey, Jane B. Reece
Publisher: PEARSON
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Chapter 1, Problem 13PS
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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Some varieties of soybeans have been genetically modified. They have been changed so that they do not die when a particular herbicide is sprayed on a field. How would this genetic modification improve the soybean crop?
It would enable the crop plants to kill nearby weeds directly.
It would protect the crop when farmers sprayed for harmful insects.
It would allow farmers to eliminate weeds that compete with the crop.
It would increase the fitness of the crop plants and improve their growth.
Certain genetically modified tomatoes were designed to suppress (reduce the effectiveness) the enzyme polygalactias which delays ripening.
How does this gene modification affect the consumer and the diet of individuals in developing countries?
options:
Delaying the ripening process means that the tomatoes have a longer shelf life. The tomatoes survive delivery to the consumer and provide nutritional value to more people.
Delaying the ripening process means that the tomatoes can stay on the vine longer to receive nutrients. Once picked, these tomatoes will ripen rapidly to provide a full taste to the consumer.
Delaying the ripening process means that the tomatoes are more likely to freeze on the vine before becoming ripe. This freezing process locks in the minerals and beneficial nutrients so that the tomato can be transported without losing its nutritional benefit.
Delaying the ripening process means that the tomatoes are more likely to have a shorter shelf…
In most parts of the world, commercial potato crops are produced asexually by planting tubers. However, in some regions of the world, such as Southeast Asia and the Andes, some potatoes are grown from true seeds. Discuss the advantages and disadvantages of growing potatoes from true seed.
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Campbell Essential Biology with Physiology (6th Edition)
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