Algae

If you are asked to classify the various algae into distinct groups, which of the following characters you should choose?

1.	Types of pigments present in the cell
2.	Nature of stored food materials in the cell
3.	Structural organisation of thallus
4.	Chemical compositions of the cell wall

Which one of the following has haplontic life cycle?

1. Funaria

2. Polytrichum

3. Ustilago

4. wheat

Which one of the following is common to multicellular fungi, filamentous algae and protonema of mosses?
1. Diplontic life cycle
2. Members of kingdom-Plantae
3. Mode of nutrition
4. Multiplication by fragmentation

Select the wrong statement:

1.	Anisogametes differ either in structure, function or behaviour
2.	In Oomycetes, the female gamete is smaller and motile, while the male gamete is larger and non-motile
3.	Chlamydomonas exhibits both isogamy and anisogamy and Fucus shows oogamy
4.	Isogametes are similar in structure, function and behaviour

Which one of the following statements is wrong?

1.	Algae increase the level of dissolved oxygen in the immediate environment
2.	Algin is obtained from red algae and carrageenan from brown algae
3.	Agar-agar is obtained from Gelidium and Gracilaria
4.	Laminaria and Sargassum are used as food

An example of colonial alga is:

1.	Volvox	2.	Ulothrix
3.	Spirogyra	4.	Chlorella

Zygotic meiosis is characteristic of?

1. Fucus

2. Funaria

3. Chlamydomonas

4. Marchantia

Life cycles of Ectocarpus and Fucus respectively are:

1. Diplontic, Haplodiplontic

2. Haplodiplontic, Diplontic

3. Haplodiplontic, Haplontic

4. Haplontic, Diplontic

Male and female gametophytes do not have an independent free-living existence in:

1. Pteridophytes

2. Algae

3. Angiosperms

4. Bryophytes

Hydrocolloid carrageen is obtained from:
1. Phaeophyceae only
2. Chlorophyceae and Phaeophyceae
3. Phaeophyceae and Rhodophyceae
4. Rhodophyceae only