Biological Science, Loose-leaf Edition (7th Edition)
7th Edition
ISBN: 9780135272800
Author: Scott Freeman, Kim Quillin, Lizabeth Allison, Michael Black, Greg Podgorski, Emily Taylor, Jeff Carmichael
Publisher: PEARSON
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Chapter 29, Problem 15PIAT
Summary Introduction
To review:
The comparison between the launch speed and acceleration of Pilobolus and other
Introduction:
The sporangium is the structure, in which the process of meiosis occurs during the life cycle of sporophytic mycelium. The sporangium discharge occurs in several spore-shooting fungi. The table below shows the data related to the launch speed and the acceleration of sporangium discharge in different fungi.
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The basidium of the club fungi could be correctly described as;
A reproductive structure that produces diploid spores
A sexual reproductive structure that produces 4 haploid spores
An asexual reproductive structure that produces thousands of spores
A sexually reproductive structure that produces 8 haploid spores
Indicate the ploidy number for each of the following cells indicated on the life cycle diagram above. Haploid = 1 and Diploid = 2.
zygote
Answer
basidiospores
Answer
basidium with four nuclei
Answer
mycelia
Answer
Complete the following table distinguishing the true fungi phyla based on reproduction.
SEXUAL reproduction
through conjugation of 2
different mating strains
ASEXUAL reproduction
by conidial
ASEXUAL reproduction
by spores (produced in
sporangia)
ASEXUAL reproduction
by conidia (produced on
tips of conidiophores) or
budding
Do not perform SEXUAL
reproduction.
SEXUAL reproduction by
fusion of 2 mating types
of monokaryotic hyphae.
Resulting dikaryotic
mycelium often develops
basidiomata
SEXUAL reproduction
through the union of
male and female
structures, followed by
formation of asci
ASEXUAL reproduction
by zoospores (produced
in zoosporangia)
ASEXUAL reproduction
is rare, but can occur by
conidia.
SEXUAL reproduction
through fusion of two
motile or non-motile
gameres
PHYLUM
Chytridiomycota
The Chytrids
Zygomycota:
The Coenocytic True Fungi
Ascomycota:
The Sac Fungi
Basidiomycota:
The Club Fungi
Deuteromycota:
The Imperfect Fungi
ASEXUAL
SEXUAL
REPRODUCTION REPRODUCTION
Chapter 29 Solutions
Biological Science, Loose-leaf Edition (7th Edition)
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- Individual amoebae (Dictyostelium discoideum) occasionally aggregate into a colony. About 20 percent of the amoebae in the colony make up a stalk that supports a ball composed of the remainder of the amoebae. The stalk-forming individuals die without reproducing, whereas the amoebae in the ball, or fruiting body, give rise to spores that can become new individuals after the spores are carried away from the colony by passing insects and the like. On occasion two genetically different strains of the amoeba cooperate in the formation of a stalked fruiting body. What evolutionary puzzle is posed by this observation? Use kin (indirect) selection theory to make a prediction about the genetic similarity of the strains that work together when forming a colony versus those that do not. Please Do not write from an online sourcearrow_forwardZygomycete bread molds such as Rhizopus stolonifer (black bread mold) produce sporangia in both sexual and asexual reproductive cycles. Which of the following do the sexual sporangia of Rhizopus stolonifer originate from (i.e. what does the sporangia grow out of)? Select one: O a. from the aseptate hyphae O b. from the zygosporangium O c. from the substrate O d. from the gametangiaarrow_forwardIn the pictures below, identify the arrowed reproductive structures of microscopic cyanobacteria based on the following descriptions: Akinetes are dormant structures larger than the vegetative cells, are rich in food reserves, and have thick walls. Most filamentous cyanobacteria develop akinetes in adverse conditions (e.g., winter, dry periods). When favorable conditions return, they germinate and produce new filaments. Hormogonia are short pieces of filaments consisting of 5–15 trichomes that fragment and develop into new filaments. Heterocytes (or heterocysts) are multicellular structures that have a thick and massive sheath, formed by members of the Nostocales. It is the location of the enzyme nitrogenase for nitrogen fixation, the conversion of nitrogen gas into ammonium and then amino acids. They may be intercalary or terminal in position and may germinate from either end or both the ends to give rise to new filaments. Non-filamentous cyanobacteria generally produce spores…arrow_forward
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