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Ch. 38 - Angiosperm Reproduction and Biotechnology
Campbell - Campbell Biology 11th Edition
Urry11th EditionCampbell BiologyISBN: 9789357423311Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoUrry 11th EditionCh. 38 - Angiosperm Reproduction and BiotechnologyProblema 4
Capitolo 38, Problema 4

Which statement concerning grafting is correct?
a. Stocks and scions refer to twigs of different species.
b. Stocks and scions must come from unrelated species.
c. Stocks provide root systems for grafting.
d. Grafting creates new species.

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1
Understand the concept of grafting: Grafting is a horticultural technique where tissues from one plant are inserted into those of another so that the two sets of vascular tissues may join together.
Identify the components involved in grafting: The 'stock' is the part of the plant that provides the root system, while the 'scion' is the part that is grafted onto the stock and typically contains the desired traits such as fruit or flower production.
Evaluate the options given in the problem: Consider each statement and determine its accuracy based on the definition and components of grafting.
Analyze option c: Stocks provide root systems for grafting. This statement aligns with the definition of grafting, where the stock is indeed the part that provides the root system.
Conclude which statement is correct: Based on the analysis, option c is the correct statement concerning grafting.

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Grafting

Grafting is a horticultural technique where tissues from one plant are inserted into those of another so that the two sets of vascular tissues may join together. It is commonly used to propagate plants, repair damaged trees, or combine desirable traits from different plants. The process involves a stock (root system) and a scion (the upper part of the plant).

Stocks and Scions

In grafting, the stock refers to the plant that provides the root system, while the scion is the part of the plant that is grafted onto the stock. The stock supports the scion and provides it with water and nutrients. Typically, stocks and scions are chosen from related species to ensure compatibility and successful grafting.
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Compatibility in Grafting

For successful grafting, the stock and scion must be compatible, usually meaning they are from the same species or closely related species. This compatibility ensures that the vascular tissues can effectively join and function together. Unrelated species are generally not compatible for grafting, as their tissues may not integrate properly.
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The black dots that cover strawberries are actually fruits formed from the separate carpels of a single flower. The fleshy and tasty portion of a strawberry derives from the receptacle of a flower with many separate carpels. Therefore, a strawberry is:

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Some dioecious species have the XY genotype for male and XX for female. After double fertilization, what would be the genotypes of the embryos and endosperm nuclei?

a. Embryo XY/endosperm XXX or embryo XX/endosperm XXY

b. Embryo XX/endosperm XX or embryo XY/endosperm XY

c. Embryo XX/endosperm XXX or embryo XY/endosperm XYY

d. Embryo XX/endosperm XXX or embryo XY/endosperm XXY

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