
Concept explainers
Introduction:

Answer to Problem 6STP
Correct answer :
The correct answer is option (D) Zygomycota
Explanation of Solution
Explanation/justification for the correct answer :
Option (D) Zygomycota. In zygomycota, zygospores are formed by the fusion of haploid cells. This zygospore germinates and undergoes meiosis to produce hyphae with a sporangium. Each haploid spore formed in the new sporangium can grow into a new mycelium. Therefore, the given image is the reproductive structures of zygomycota. So, the correct answer is option (D).
Explanation for incorrect answer :
Option (A) Ascomycota. In Ascomycota, the sexual reproduction is complicated. It takes place when hyphae from opposite mating types fuse and one nucleus from each type pairs off in separate cells. The hyphae will develop a special reproductive structure called ascocarp. Therefore, the given image is not the reproductive structures of Ascomycota. So, this is an incorrect option.
Option (B) Basidiomycota. Basidiomycota produce asexual spores. The mycelium will produce sexually by forming a basifiocarp. Therefore, the given image is not the reproductive structures of Basidiomycota. So, this is an incorrect answer.
Option (C) Deuteromycota. The sexual reproduction in these fungi never has been observed. Because these fungi appear to lack a sexual stage, they are referred as the imperfect fungi. Therefore, the given image is not the reproductive structures of Deuteromycota. So, this is an incorrect answer.
Chapter 21 Solutions
Biology Illinois Edition (Glencoe Science)
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