Which one of the following is wrongly matched?

(1)

Puccinia      

– Smut

(2)

Root

– Exarch protoxylem

(3)

Cassia

– Imbricate aestivation

(4)  

Root pressure  

– Guttation

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Single-celled eukaryotes are included in 

(a) Protista                   (b) Fungi

(c) Archaea                  (d) Monera

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Membrane-bound organelles are absent in

(1) Saccharomyces

(2) Streptococcus

(3) Chlamydomonas

(4) Plasmodium

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Virus envelope is known as

(1) capsid

(2) virion

(3) nucleoprotein

(4) core

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Some hyperthermophilic organisms that grow in highly acidic (pH2) habitats belong to the two groups called

(1) eubacteria and archaea

(2) cyanobacteria and diatoms

(3) protists and mosses

(4) liverworts and yeasts

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Infectious proteins are present in

(1) gemini viruses

(2) prions

(3) viroids

(4) satellite viruses

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Oxygenic photosynthesis occurs in

(1) Chromatium

(2) Oscillatoria

(3) Rhodospirillum

(4) Chlorobium

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Which one is the wrong pairing for the disease and its causal organism?

(1) late blight of potato-Alternaria solani

(2) Black rust of wheat-Puccinia graminis

(3) Loose smut of wheat-Ustilago nuda

(4) Root-knot of vegetables-Meloidogyne sp.

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T. O. Diener discovered a

(1) free infectious RNA

(2) free infectious DNA

(3) infectious protein

(4) bacteriophage

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Consider the following four measures (A-D) that could be taken to successfully grow chick pea in an area where bacterial blight disease is common

(A) spray with Bordeaux mixture

(B) control of the insect vector of the disease pathogen

(C) use of only disease-free seeds

(D) use of varieties resistant to the disease

Which two of the above measures can control the disease?

(1) B and C

(2) A and B

(3) C and D

(4) B and D

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