Biology
10th Edition
ISBN: 9780073383071
Author: Raven
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 39, Problem 1S
Summary Introduction
To explain:
The reason behind the intentional and inadvertent selection of the crops, with lower levels of toxic compounds while domesticating the crops.
Introduction:
The domestication of plants and animals refers to the selection and adaption of the wild-type animals and plants by the humans for use. Usually, the domesticated species are nurtured for work, food, clothing. and medicines.
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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.
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Intraspecific competition is a competition between members of the same species and is commonly observed in crop plants. Table 6.2 shows the results of a greenhouse experiment which examined the effects of density on the germination and growth of barley. Plants were grown for two weeks in 10- cm diameter pots kept in identical environmental conditions and watered regularly. At the end of the experiment the plants were cropped by cutting the stems at the soil surface.
Explain why knowledge of the effects in density is important to the crop farmer.
a) Which of the following statements describes domestication?
It is the process by which animals are trained to do tricks useful for human needs.
It is the process by which wild species have been turned into species with traits that are useful for human needs.
It is the process by which animals build nests to attract mates and raise young.
It is the process by which plants have evolved to fill in ecological niches over time.
b)To illustrate how common corn is in a typical American diet, the film narrator gives many examples, from corn-on-the-cob to foods that contain cornstarch and corn syrup. The narrator also mentions meat. What is the connection between the meat we eat and corn?
Chapter 39 Solutions
Biology
Ch. 39 - Nonnative invasive species are often a threat to...Ch. 39 - Prob. 2UCh. 39 - Prob. 3UCh. 39 - Prob. 4UCh. 39 - Parasitoid wasps protect plants from caterpillars...Ch. 39 - In response to wounding, a tomato plant first...Ch. 39 - When a cell undergoes a hypersensitive response,...Ch. 39 - The wound response products that bind to digestive...Ch. 39 - If a plant has been attacked by a pathogen, then...Ch. 39 - Prob. 1A
Ch. 39 - Both plant and animal immune systems can a....Ch. 39 - Your friend informs you that it is highly likely...Ch. 39 - Prob. 4ACh. 39 - You decide to plant a garden with a beautiful...Ch. 39 - Prob. 6ACh. 39 - Prob. 1SCh. 39 - Parasitoid wasps seem like an effective method to...Ch. 39 - Prob. 3S
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