Chapter 7 (Kingdom Protoctista or Protista) F.Sc 1st Year Short Questions

Name two plant-like protists groups.

Algae are plant-like protists e.g., Euglenoids, Dinoflagellates, Ditoms etc.

What kind of photosynthetic pigments are found in plants and algae?

Five types of chlorophylls occur in plants other than bacteria—a, b, c, d and e. Out of these only two chlorophylls occur in the chloroplasts of higher plants, a and b. In addition to green chlorophyll a and yellow and orange carotenoids, which are photosynthetic pigments found in all algae, different algae phyla possess a variety of other pigments (such as xanthophylls and phycoerythrin) that are also important in photosynthesis.

Justify that Euglenoids are close to Zooflagellates.

These are small fresh water organisms. Based on molecular data, euglenoids are thought to be closely related to zooflagellates. They are plantlike in their pigments. One third of all genera have chloroplasts, the rest do not. Those which lack chloroplasts ingest or absorb their food. Euglenoids grown in the absence of light lose their chloroplasts and become heterotrophic. Pyrenoids produce carbohydrates.

Write a note on Brown algae.

Brown algae include the giants of the protist kingdom and range from a few centimetres to approximately 75 meters in length. All brown algae are multicellular. The largest brown algae, called the kelps, are tough and leathery in appearance. They possess leaflike blades, stemlike stipes, and rootlike anchoring holdfast. Brown algae are common in cooler marine waters, especially along rocky coastlines in the intertidal zone.

2 thoughts on “Chapter 7 (Kingdom Protoctista or Protista) F.Sc 1st Year Short Questions”

Leave a Comment