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Choose the incorrect statement from the following.
(a)Dinoflagellates have stiff cellulose plates on the outer surface.
(b)Euglenoids have two flagella, one lies longitudinally and the other transversely.
(c)Slime mould's spores are dispersed by air current.
(d)In diatoms the cell wall forms two thin overlapping shells.

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Important Questions on Biological Classification
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List - I Organism |
List - II Number of Flagella |
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(a) | Trypanosoma | (i) | Many |
(b) | Euglena | (ii) | |
(c) | Giardia | (iii) | |
(d) | Trichonympha | (iv) |
The correct answer is

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slide Unicellular, two well-defined nuclei, ciliated, without a cell wall
slide Unicellular, chloroplast, one nucleus, biflagellated, with a cell wall
slide Unicellular, one nucleus, non-flagellate, with a cell wall
The organisms likely to be present on the slides and respectively, are

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Assertion (A): Euglenoids have a flexible body.
Reason (R): They have a protein rich layer called pellicle, which makes their body flexible.
Which of the following is true?

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Match the following
Type of Flagellum | Example | ||
A) | Stichonematic | I) | Cryptomonas |
B) | Pantonematic | II) | Astasia |
C) | Anematic | III) | Chlamydomonas |
D) | Acronematic | IV) | Monas |
V) | Urceolus |
The correct match is:

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Match the following related to sexual reproduction in protozoa ?
List I | List II | ||
(i) | Hologamy | (a) | Plasmodium |
(ii) | Amphimixis | (b) | Monocystis |
(iii) | Anisogamy | (c) | Trichonympha |
(iv) | Isogamy | (d) | Union of pronuclei of the gamets |

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The given statements describe a group of organisms. Which of the following group is referred here ?
(i) Instead of a cell wall they have a protein rich pellicle making their body flexible
(ii) They have flagella, a short and a long one
(iii) They show mixotroplic nutrition
(iv) They are connecting link between plants and animals

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