Choose the correct statement.

1. Many species of Porphyra, Laminaria and Sargassum and among 70 species of marine algae used as food.

2. Agar is used to grow microbes and in preparations of ice creams and jellies.

3. Algae are useful to man in a variety of ways.

4. All of these.

Cell wall of green algae is made up of

1. Inner layer of chitin and outer layer of pectose.

2. Inner layer of cutin and outer layer of pectin.

3. Inner layer of pectose and outer layer of cellulose.

4. Inner layers of cellulose and outer layer of pectose.

Out of the following four statements how many of them are correct for Fucus.
I.  Life – cycle is diplontic.
II. Fertilisation is internal.
III. Sexual reproduction is Oogamous.
IV.  Frond is photosynthetic.
1. 4
2. 3
3. 2
4. 1

Which of the following is not an example of algae in which there is post – fertilization development process?
1. Laminaria
2. Porphyra
3. Polysiphonia
4. Batrachospermum

Fresh water form is rare in which algal group
1. Red Algae
2. Brown algae
3. Green Algae
4. Both 1. and 2.

Which of the following is not matched correctly?

Which of the following character is common for all algal group.
1.Presence of cellulose in cell – wall.
2.Starch is reserve food material.
3.Presence of motile stage.
4. Only oogamous type of sexual reproduction.

Study the diagram given below, and find out how many of the statements given below is related to this diagram.

I. It is source of food.
II. Its wall has poly sulphated esters.
III. Its reserve food is similar to glycogen in structure.
IV. There is no motile stage in its life – cycle.
1. 1
2. 2
3. 3
4. 4

Pyrenoids in green algae is located in?
1. Cytoplasm
2. Chloroplast
3. Vacuole
4. Flagella

Following diagram represents a class of algae.

Find out odd statement related to this class of algae.
1. In protoplast a centrally located vacuole is present.
2. Body colour depends upon concentration of fucoxanthin.
3. Pyriform zoospore with laterally inserted unequal flagella.
4. Food is stored in form of simple carbohydrate.