Q. No.Which of the following pairs is of unicellular algae?
1.
Gelidium and Gracilaria
2.
Anabaena and Volvox
3.
Chlorella and Spirulina
4.
Laminaria and Sargassum
Porphyra, Sargassum and Laminaria are all:
I. brown algae
II. marine edible algae
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
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The correct description of zoospores involved in asexual reproduction in most brown algae will be:
1. Biflagellate, pear-shaped, lateral unequal flagella
2. Biflagellate, pear-shaped, apical equal flagella
3. Biflagellate, lens-shaped, lateral unequal flagella
4. Biflagellate, lens-shaped, apical equal flagella
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
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To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
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An important feature of bryophytes is that the embryonic development of the zygote takes place in the:
| 1. Sporangium | 2. Archegonium |
| 3. Protonema | 4. Antheridium |
Which of the following is not true for the green alga Spirogyra?
1. Unbranched, filamentous and commonly found in stagnant fresh water bodies.
2. The filament is composed of large number of long, cylindrical cells placed one above the other in a single row.
3. The cells are characterised by long spiral ribbon-shaped chloroplasts with several pyrenoids.
4. There are multiple small vacuoles in each cell.
In contrast to conifers, gnetophytes produce:
1. Simple pollen strobili and simple seed strobili
2. Simple pollen strobili and compound seed strobili
3. Compound pollen strobili and simple seed strobili
4. Compound pollen strobili and compound seed strobili
Sphagnum can be distinguished from mosses by all the following characteristics except:
1. The stem has no rhizoids
2. Leaves have green and hyaline cells
3. The sex organs do not limit the indefinite growth of the main axis
4. The capsule is borne on seta
A species of red algae has been discovered near Bahamas at a depth of more than 260 m. This unusual feat is possible because this alga:
| 1. | lacks pigmentation and functions heterotrophically as parasite on other plants |
| 2. | has significant amount of phycoerythrin in addition to chlorophyll a and d |
| 3. | unlike other red algae has flagellated gametes |
| 4. | it has large number of root like rhizoids enabling it to attach to a deep substratum |
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