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Ans: (a) Volvox
An example of a sigma bonded organometallic compound is (a) Grignard's reagent (b) ferrocene (c) cobaltocene (d) ruthenocene.
Zygotic meiosis is characteristic of (a) Fucus (b) Funaria (c) Chlamydomonas (d) Marchantia.
Mycorrhizae are the example of (a) amensalism (b) antibiosis (c) mutualism (d) fungistasis.