Which of the following statements is correct?

  • A
    Fusion of two cells is called Karyogamy.
  • B
    Fusion of protoplasms between two motile or non-motile gametes is called plasmogamy.
  • C
    Organisms that depend on living plants are called saprophytes.
  • D
    Some of the organisms can fix atmospheric nitrogen in specialized cells called sheath cells.

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To which group of organisms does the given figure belong?

Identify the incorrect pair from the following:

Plasmogamy is the fusion of

Match the following columns:
Column-$I$ (Class)Column-$II$ (Examples)
$P$. Ascomycetes$I$. Alternaria,Colletotrichum,Trichoderma
$Q$. Phycomycetes$II$. Aspergillus,Claviceps,Neurospora
$R$. Basidiomycetes$III$. Agaricus,Ustilago,Puccinia
$S$. Deuteromycetes$IV$. Mucor,Rhizopus,Albugo

What is the shape of a perithecium?

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