Open Question
Propose an experiment to test whether Pilobolus shoots its sporangia preferentially toward light. Hypothesize why such a preference might be advantageous.
29. Fungi
Fungi Reproduction
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Where and when does fertilization occur in the mushroom life cycle?
A
Underground, as a mycelium begins to spread
B
On the surface of the ground, when a basidiospore germinates
C
Underground, when the hyphae of different mating types fuse
D
In a mushroom, when eggs and sperm meet
E
In a mushroom, when the nuclei of a dikaryotic cell fuse
Verified step by step guidance1
Understand the basic life cycle of a mushroom, which includes stages such as spore germination, mycelium formation, and fruiting body development.
Recognize that mushrooms are part of the Basidiomycota group, which undergoes sexual reproduction involving the fusion of nuclei from different mating types.
Identify that fertilization in mushrooms does not involve eggs and sperm like in animals, but rather the fusion of nuclei within specialized cells.
Learn that the dikaryotic stage is unique to fungi, where two nuclei coexist in a single cell without immediately fusing.
Conclude that fertilization occurs in the mushroom when the nuclei of a dikaryotic cell fuse, leading to the formation of a diploid cell, which is a key step in the reproductive cycle.
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