Reproduction involving fusion between one large, non-motile (static) female gamete and a smaller, motile male gamete is termed:
1. Isogamous
2. Agamous
3. Anisogamous
4. Oogamous
Subtopic:  Algae |
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How many of the given statements are correct regarding economic importance of algae?
I: Many species of Porphyra, Laminaria and Sargassum are used as food.
II: Hydrocolloids (water holding substances), e.g., algin from red algae and carrageen from brown algae are used commercially.
III: Agar is obtained from Gelidium and Gracilaria.
IV: Chlorella a unicellular alga rich in proteins is used as food supplement.
1. 1
2. 2
3. 3
4. 4
Subtopic:  Algae |
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Level 2: 60%+
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Consider the given two statements:
Statement I: All algae contain chlorophyll a as the primary photosynthetic pigment.
Statement II: All algae reproduce sexually by the production of spores.
 
1. Both Statement I and Statement II are true
2. Statement I is true but Statement II is false
3. Statement I is false but Statement II is true
4. Both Statement I and Statement II are false
Subtopic:  Algae |
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The composition of the cell wall in algae varies widely among different groups. Which of the following is not a common component of algal cell walls?
1. Cellulose 2. Pectin
3. Chitin 4. Algin
Subtopic:  Algae |
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Match each item in Column-I with one in Column-II and select the correct match from the codes given:
Column-I Column-II
A. Isogamy P. Spirogyra
B. Anisogamy Q. Eudorina
C. Oogamy R. Volvox
Codes:
A B C
1. Q R P
2. Q P R
3. P Q R
4. R Q P
Subtopic:  Algae |
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Identify the correct statements:
I: The gametes are flagellated and similar in size in Ulothrix or non-flagellated (non-motile) but similar in size in Spirogyra.
II: Fusion of two gametes dissimilar in size, as in species of Eudorina is termed as anisogamous.
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
Subtopic:  Algae |
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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

Subtopic:  Algae |
 62%
Level 2: 60%+
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