Biology
The individual chain of cells or filament in the colony of Nostoc is known as

Heterocyst
Trichome
None of these
Hormogonia

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Biology
In test tube baby

Fertilization of ova and development takes place in test tube
Fertilization takes place in uterus while development takes place in test tube
Fertilization of ova takes place in test tube which development of embryo occur in uterus
Development of ova take place in test tube without fertilization

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