Insect-Assisted Fertilization in Moss Moss sperm can swim, but plant ecologist Nils Cronberg suspected that they sometimes hitch a ride on crawling insects or mites (tiny animals related to spiders). To test this hypothesis he carried out an experiment. He placed patches of male and female moss gametophytes in dishes, either next to one another or with water-absorbing plaster between them. The plaster prevented sperm from Swimming between plants. He then looked at how the presence or absence of insects affected the number of sporophytes formed. FIGURE 22.8 shows his results. FIGURE 22.8 Sporophyte production in female moss patches with and without either crawling insects (springtails) or mites. No Sporophytes formed in the animal-free dishes when moss patches were 2 or 4 centimeters apart Does this study support the hypothesis that insects and mites aid moss fertilization?

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Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332
BuyFind

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332

Solutions

Chapter
Section
Chapter 22, Problem 3DAA
Textbook Problem

Insect-Assisted Fertilization in Moss Moss sperm can swim, but plant ecologist Nils Cronberg suspected that they sometimes hitch a ride on crawling insects or mites (tiny animals related to spiders). To test this hypothesis he carried out an experiment. He placed patches of male and female moss gametophytes in dishes, either next to one another or with water-absorbing plaster between them. The plaster prevented sperm from Swimming between plants. He then looked at how the presence or absence of insects affected the number of sporophytes formed. FIGURE 22.8 shows his results.

Chapter 22, Problem 3DAA, Insect-Assisted Fertilization in Moss Moss sperm can swim, but plant ecologist Nils Cronberg

FIGURE 22.8 Sporophyte production in female moss patches with and without either crawling insects (springtails) or mites. No Sporophytes formed in the animal-free dishes when moss patches were 2 or 4 centimeters apart

Does this study support the hypothesis that insects and mites aid moss fertilization?

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