HARD
Earn 100
How many statements are correct with respect to chrysophytes?
(i) They are found in the marine environment, freshwater organisms are very rare.
(ii) In diatoms, the cell walls form two thick overlapping shells which fit together as in a soapbox.
(iii) The cell membranes of diatoms are embedded with silica and accumulation of them over billions of years is referred to as "diatomaceous earth".
(iv) Diatoms are the chief "Producers" in the oceans.
37.5% studentsanswered this correctly
Important Questions on Biological Classification
MEDIUM
|
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
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MEDIUM
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MEDIUM
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 |
EASY
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
HARD
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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MEDIUM
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?
