Consider the following statements regarding tobacco mosaic viruses and choose the correct answer:
1. Tobacco mosaic viruses are sap transmissible
2. These can stand a high degree of dilution
3. Breaking of a hair with contaminated instrument serves as a means of transmitting the virus
4. These viruses are insect borne
A. Only 1 and 4 are true
B. Only 3 and 4 are true
C. Only 1, 2 and 3 are true
D. Only 2, 3 and 4 are true
Answer: Option C
Related Questions on Plant Anatomy and Physiology
A. Cinnamomum - Amoora association
B. Bischofia - Dillenia association
C. Shorea - Lagerstroemia association
D. Mesua - Michelia association
Which of the following react with haemoglobin, forming methemoglobin which will not take up oxygen?
A. Nitrates
B. Nitrites
C. Carbides
D. Oxides
Internally, hydathode shows a group of loosely arranged parenchymatous cells called as
A. Epiderm
B. Epithelium
C. Ampithecium
D. Epithem

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