- The reproduction in Algae occurs by
(1) Vegetative
(2) Asexual
(3) Sexual
(4) All of these - Algae can be found on
(1) Sloth bear
(2) Dog
(3) Camel
(4) Rabbit - Algae may occur
(1) Moist Stones
(2) Moist Soils and moist wood
(3) Occur in association with fungi
(4) All of these - Asexual reproduction is by the production of different types of spores. Out of that most common is
(1) Carpospore
(2) Zoospores
(3) Basidiospores
(4) Akinetes - Hydrocolloid is
(1) Water soluble substance
(2) Water holding substance
(3) Hydrogen gas containing substance
(4) Oxygen gas containing substance
- Algae are useful
(1) Because at least half of the total carbon dioxide fixation on Earth is carried out by algae through photosynthesis.
(2) Algae being photosynthetic can increase the level of dissolved oxygen in their immediate environment
(3) They are primary producers of energy rich compounds and form the basis of the food cycles of all aquatic animals
(4) All of the above - Oogamous
(1) Non-motile male gamete
(2) Large male gamete
(3) Non-motile female gamete
(4) Small female gamete - An example of colonial alga is
(1) Chlorella
(2) Volvox
(3) Ulothrix
(4) Spirogyra - The members of chlorophyceae are not
(1) Green algae
(2) Unicellular, colonial or filamentous plant body
(3) Pigments chlorophyll a and b
(4) Pigments are localised in the cytoplasm - The incorrect match for chlorophyll type is
(1) Chlamydomonas
(2) Spirogyra
(3) Volvox
(4) Fucus
12. Which of the marine algae is not used as food?
(1) Laminaria
(2) Sargassum
(3) Porphyra
(4) Volvox
- Agar is not obtained from
(1) Gelidium
(2) Gracilaria
(3) Volvox
(4) All of these - Agar is not used in
(1) To grow microbes
(2) To prepare ice-creams
(3) To prepare jellies
(4) To supplement protein for space travellers - Algae are useful because they
(1) are large in number
(2) are used in alcoholic fermentation
(3) purify the atmosphere
(4) are used in curdling of milk - Which one of the following statements is wrong?
(1) Algin and carrageenan are products of algae
(2) Agar-agar is obtained from Gelidium and Gracilaria
(3) Chlorella and Spirulina are used as space food
(4) Mannitol is stored food in Rhodophyceae
- Blue Green algae comes under
(1) Monera
(2) Brown Algae
(3) Eukaryotes
(4) Plantae
- Chlorella is not
(1) An unicellular alga
(2) Rich in proteins
(3) Used as food supplement even by space travellers
(4) Used to grow microbes
- 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
20. Anisogamous
(1) Gametes dissimilar in size
(2) Gametes are similar in size but not in motility
(3) Gametes are similar in motility but not in size
(4) Gametes are similar in size and motility
