Q. No.The pyrenoids are made up of
| 1. | Proteinaceous centre and starchy sheath |
| 2. | Core of protein surrounded by fatty sheath |
| 3. | Core of starch surrounded by sheath of protein |
| 4. | Core of nucleic acid surrounded by protein sheath |
Consider the following features:
| I. | Chlorophyll a and Chlorophyll c |
| II. | Fucoxanthin |
| III. | Floridean starch |
| IV. | Flagella 2 in number, unequal and lateral |
Which of these are seen in Phaeophyceae?
1. I, II, III
2. I, II, IV
3. II, III, IV
4. I, II, III, IV
The endosperm of a gymnosperm develops _______ fertilization, whereas the endosperm of an angiosperm develops _________ fertilization.
(1) before, before
(2) after, after
(3) after, before
(4) before, after
In Pinus,
| I. | The stem is branched |
| II. | Roots have fungal association in the form of mycorrhiza |
| III. | The male and female strobili are borne on different trees |
| 1. | Only I is correct |
| 2. | Only II is correct |
| 3. | Only I and II are correct |
| 4. | I, II and III are correct |
Identify the incorrect statement:
| 1. | The earliest systems of classification used only gross superficial morphological characters. |
| 2. | Linnaeus classification of plants was a natural classification as it was based on the androecium structure. |
| 3. | Artificial systems gave equal weightage to vegetative and sexual characteristics. |
| 4. | Natural classification systems are based on natural affinities among the organisms |
Identify the incorrect statement:
| 1. | Numerical Taxonomy is based on all observable characteristics. |
| 2. | More weightage is given to reproductive characters and all other characters are given equal importance in numerical taxonomy. |
| 3. | Cytotaxonomy is based on cytological information like chromosome number, structure, behaviour |
| 4. | Chemotaxonomy uses the chemical constituents of the plant |
Match each term with its definition and choose your answer from the codes given:
|
I. |
Isogamy |
1. |
The union of two gametes |
|
II. |
Syngamy |
2. |
Two gametes, one larger than the other |
|
III. |
Heterogamy |
3. |
Two kinds of gametes, one motile and other non motile |
|
IV. |
Anisogamy |
4. |
Two kinds of morphologically distinct gametes |
|
V. |
Oogamy |
5. |
Both gametes morphologically indistinguishable |
Codes:
|
|
I |
II |
III |
IV |
V |
|
1. |
1 |
2 |
3 |
4 |
5 |
|
2. |
4 |
1 |
2 |
3 |
4 |
|
3. |
5 |
1 |
2 |
4 |
3 |
|
4. |
3 |
1 |
2 |
4 |
5 |
Identify the incorrectly matched pair:
| 1. | Chlamydomonas: | Microscopic unicellular algae |
| 2. | Volvox: | Colonial algae |
| 3. | Ulothrix: | Filamentous algae |
| 4. | Fucus: | Isogamous algae |
Identify the incorrect statement regarding algae:
| 1. | At least a half of the total carbon dioxide fixation on earth is carried out by algae through photosynthesis. |
| 2. | Around 70 species of freshwater algae can be used as food. |
| 3. | Certain marine brown and red algae produce large amounts of hydrocolloids (water holding substances), e.g., algin (brown algae) and carrageen (red algae) which are used commercially. |
| 4. | Agar, obtained from Gelidium and Gracilaria are used to grow microbes and in preparations of ice-creams and jellies. |
What is not true for red algae?
| 1. | Lack centriole and flagella |
| 2. | Accessory pigments include phycocyanin, phycoeythrin and allophycocyanin |
| 3. | They reproduce using alternation of generation |
| 4. | The stored food is floridean starch very similar to cellulose |
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