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

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How do slime molds behave during unfavorable conditions?

During unfavourable conditions, slime mold forms resistant haploid spores by meiosis within stalked structures called sporangia.

Write four important features of algae.

  • Algae are photosynthetic protists, carrying out probably 50 to 60 percent of all the photosynthesis on earth.
  • Algae, are unicellular and the zygote is not protected by the parent body.
  • Algae have thallus like body because their body cannot be differentiated into true roots, stems and leaves and lack xylem and phloem.
  • Almost all algae are aquatic.

Differentiate between spore and cyst.

A spore is the reproductive part having a protective covering as aspore for its germination has to face harsh environmental conditions such as air currents whereas cyst is the group of cells which come together to protect themselves from harsh conditions. Cyst has nothing to do with the reproduction of the cell.

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