CBSE
'Sagopalm' is obtained from
Pinus
Cycas
Ginkgo
Datepalm
What did Engelmann observe from his prism experiments?
Bacteria could not detect the sites of O2 evolution.
Bacteria release excess carbon dioxide in red and blue light
Bacteria accumulated due to the increase in temperature caused by increase in oxygen concentration
Bacteria get accumulated towards red and blue light
Identify the character which is absent in Fucus.
Hetrogametes
Oogamy
Non-flagellated male gamates
Holdfast
Select the mismatch
Algae | Thallus |
Chalamydomonas | Unicellular flagellate |
Chlorella | Unicellular non flagellate |
Ulva | Parenchymatous |
Volvox | Non- flagellate colonies |
Arrange the following plants in descending order based on the number of locules in their ovaries.
I. Anacardium
II. Citrus
III. Asparagus
IV. Solanum
II, III, IV, I
III, I, IV, II
IV, III, I, II
I, IV, III, I
Which of the following pair of characters distinguish Gnetum from Cycas and Pinus?
Abscence of resin duct and leaf venation
Prasence of vessel elements and absence of archegonia
Perianth and two integuments
Embryo development and apical meristem
Study the following Columns.
Column I | Column II |
A. Strobilanthus | 1. Tiger claw plant |
B. Martynia | 2. Century plant |
C. Lodoecia | 3. Neelakuranji |
D. Viola |
4. Common pansy 5. Double coconut |
A - 2; B - 3; C - 1; D - 5
A - 3; B - 2; C - 4; D - 5
A - 2; B - 1; C - 3; D - 5
A - 3; B - 1; C - 5; D - 4
Which of the following has the largest number of chomosomes?
Haplopappus gracilis
Gaint redwood tree
Pisum sativum
Ophioglossum reticulatum
Which one of the following classesis not a representative of green-algae?
Chlorophyceae
Charophyceae
Euglenophyceae
Crysophyceae
Choose the option representing the incorrect match of different feature of major classes of algae.
Class | Cell wall | Dominant pigment |
Chlorophyceae | Cellulose + pectic material | Chl a and b, and carotene |
Phaeophyceae | Silica + pectic material | Chl a and c, carotene |
Rhodophyceae | Pectic material + cellulose | Chl a and d, carotene |
Cyanophyceae | Mucopeptide + Mumaric acid | Chl a, carotene |