Dinoflagellates:
I. Are mostly marine and photosynthetic.
II. Have a cell wall that has stiff cellulose plates on the outer surface.
III. Have two flagella
IV. Have chloroplasts bound by three membranes
The correct statements are:
(1) I, II and III
(2) I, III and IV
(3) II, III and IV
(4) I, II III and IV
Match each item in Column I with one in Column II and select your answer from the codes given below:
Column I | Column II | ||
A. | Diatoms | a. | Protein-rich layer of pellicle |
B. | Dinoflagellates | b. | Cell wall embedded with silica |
C. | Euglenoids | c. | Spores with true walls |
D. | Slime moulds | d. | Cellulose plates in the cell wall |
Codes:
A | B | C | D | |
1. | b | a | c | d |
2. | b | d | a | c |
3. | b | c | a | d |
4. | b | a | d | c |
'Red tide' is caused by
(1) Gonyaulax
(2) Ceratium
(3) Triceratium
(4) All of these
Red tides in the sea are because of
(1) Red dinoflagellates
(2) Geladium
(3) Red Chrysophytes
(4) Red algae
Dinoflagellates- do not possess which feature?
(1) Marine and photosynthetic
(2) Variety in colors
(3) Cell wall with silica
(4) Two flagella
Dinoflagellates can not appear
(1) Black
(2) White
(3) More than one option is correct
(4) Pink
Which of the following property belongs to Dinoflagellates?
(1) Loose cellulose plates in cell wall
(2) The outer surface has more loosening of cell wall than inner
(3) Rapid multiplication
(4) Not harmful for others
Which of the following is not associated with red tides
(1) Harmful for marine organisms
(2) Gonyaulax
(3) Aquatic habitat
(4) Color is due to pigment in the cell of Dinoflagellates
Red tides are due to the rapid multiplication of
1. Cyanobacteria
2. Chlamydomonas
3. Gonyaulax
4. Diatoms