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Biology

Biology
Bacteria were first discovered by

Robert Hooke
Robert Koch
Louis Pasteur
V.Leeuwenhoek

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Biology
Ginger is a stem and not a root because

It lacks chlorophyll
It has nodes and internodes
None of these
It stores food

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Biology
Which is a homologous chromosome pair?

Zygote
Gamate
Tetrad
Chromatid

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Biology
Cellulose is a

Carbohydrate
Mineral
Protein
Fat

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Biology
Study of the effects of toxic chemical substance on animal and plant is

Toxicology
None of these
Microbiology
Limnology

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Biology
Which of the following bacterium causes crown gall disease in plants?

Agrobacterium tumefaciens
None of these
Pseudomonas fluorescens
Bacillus thurigiensis

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