Biology : Biological Classification

• Absence of protein coat in viroid but present in virus

• Presence of low molecular weight RNA in virus but absent in viroid

• Both a and b

• None of the above

With respect to fungal sexual cycle, choose the correct sequence of events

• Karyogamy, Plasmogamy and Meiosis

• Meiosis, Plasmogamy and Karyogamy

• Plasmogamy, Karyogamy and Meiosis

• Meiosis, Karyogamy and Plasmogamy

Viruses are non-cellular organisms but replicate themselves once they infect the host cell. To which of the following kingdom do viruses belong to?

• Monera

• Protista

• Fungi

• None of the above

i. Aquatic habitats

ii. On decaying wood

iii. Moist and damp places

iv. As obligate parasites on plants

Choose from the following options

• None of the above

• i and iv

• ii and iii

• All of the above

What is the principle underlying the use of cyanobacteria in agricultural fields for crop improvement?

Suppose you accidentally find an old preserved permanent slide without a label. In your effort to identify it, you place the slide under microscope and observe the following features:

a. Unicellular

b. Well defined nucleus

c. Biflagellate–one flagellum lying longitudinally and the other transversely.

What would you identify it as? Can you name the kingdom it belongs to?

Why are diatoms used for polishing?

Are chemosynthetic bacteria-autotrophic or heterotrophic?

The common name of pea is simpler than its botanical (scientific) name Pisum sativum. Why then is the simpler common name not used instead of the complex scientific/ botanical name in biology?