10
MCQ (Single Correct Answer)
With respect to fungal sexual cycle, choose the correct sequence of events.
A
Karyogamy, Plasmogamy and Meiosis
B
Meiosis, Plasmogamy and Karyogamy
C
Plasmogamy, Karyogamy and Meiosis
D
Meiosis, Karyogamy and Plasmogamy
11
MCQ (Single Correct Answer)
Viruses are non-cellular organisms, but replicate themselves once they infect the host cell. To which of the following kingdom do viruses belong to?
A
Monera
B
Protista
C
Fungi
D
None of these
12
MCQ (Single Correct Answer)
Members of phycomycetes are found in
(i) Aquatic habitats
(ii) On decaying wood
(iii) Moist and damp places
(iv) As obligate parasites on plants
Choose from the following options.
A
(i) and (iv)
B
(ii) and (iii)
C
All of these
D
None of these
13
What is the principle underlying the use of cyanobacteria in agricultural fields for crop improvement?
Explanation
Cyanobacteria are used in agricultural crop improvement because of their adicity to fix atmospheric nitrogen and make it available to the plants. This improves the yield of the crops and also reduces the cost of application of nitrogen fertilisers. e.g., Anabena and Nostoc.
14
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?
Explanation
All unicellular eukaryotic organisms form a link between plants, and animals. There organisms possess a well defined nucleus with membrane bound organelles and reproduce either sexually or asexually.
The it presence of two flagella one placed longitudanally and other transversely in a furrow between wall plates makes this organisms to be placed under Kingdom-Protista.