
Decomposers are organisms that –
Decomposers are organisms that –
Operate in relay terms, simplifying step by step the organic constituents of dead body
Attack and kill plants as well as animals
Operate in living body and simplifying organic substances of cells step by step
Illaborate chemical substances, causing death of tissues

Important Questions on Biological Classification






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

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

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?

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



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:

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 |







