NEET BIOLOGY

REPRODUCTION

REPRODUCTION IN ORGANISMS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Spores are formed in a structure known as
A
Sporangia
B
Gametagia
C
Pollen sac
D
Gemmule
Explanation: 

Detailed explanation-1: -In fungi, the spores are formed on a reproductive knob-like structure known as the sporangium.

Detailed explanation-2: -primitive fungi produce spores in sporangia, which are saclike sporophores whose entire cytoplasmic contents cleave into spores, called sporangiospores. Thus, they differ from more advanced fungi in that their asexual spores are endogenous.

Detailed explanation-3: -The sporangium forms on the sporangiophore and contains haploid nuclei and cytoplasm. Spores are formed in the sporangiophore by encasing each haploid nucleus and cytoplasm in a tough outer membrane. During asexual reproduction, these spores are dispersed via wind and germinate into haploid hyphae.

Detailed explanation-4: -A sporangium can be globose to obovoid or flask-or dumbbell-shaped to somewhat cylindrical in a few taxa. Its outer wall can be smooth, have terminal spines, or be covered with calcium oxalate crystals or spines, and at maturity it can deliquesce, persist, or become evanescent, depending on the species.

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