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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 6
Capitolo 38, Problema 6

A small flower with green petals is most likely:
a. Bee-pollinated
b. Bird-pollinated
c. Bat-pollinated
d. Wind-pollinated

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1
Identify the characteristics of the flower: small size and green petals.
Consider the typical traits of flowers pollinated by different agents: bee-pollinated flowers are often brightly colored and fragrant, bird-pollinated flowers are usually tubular and brightly colored, bat-pollinated flowers are often large and open at night, and wind-pollinated flowers are typically small and not brightly colored.
Analyze the flower's characteristics in relation to these traits: the small size and green color suggest it is not adapted to attract animals like bees, birds, or bats.
Understand that wind-pollinated flowers do not rely on attracting pollinators and often have inconspicuous colors like green.
Conclude that the small flower with green petals is most likely adapted for wind pollination, as it does not exhibit traits that attract animal pollinators.

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Pollination Mechanisms

Pollination mechanisms refer to the various ways in which pollen is transferred from the male part of a flower to the female part. This can occur through biotic agents like insects, birds, and bats, or abiotic agents like wind and water. Understanding these mechanisms helps in identifying the likely pollinator based on flower characteristics.
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Pollination

Flower Characteristics and Pollinators

Different pollinators are attracted to specific flower traits. For instance, brightly colored and fragrant flowers often attract bees, while flowers with dull colors and no scent, like those with green petals, are typically wind-pollinated. Recognizing these traits is crucial for determining the pollination method.
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Pollination

Wind Pollination

Wind pollination, or anemophily, involves the transfer of pollen through the air. Flowers adapted to wind pollination usually have small, inconspicuous petals and produce large amounts of lightweight pollen. These adaptations increase the likelihood of successful pollination without the need for animal pollinators.
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Pollination
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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

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