Tag: adaptations to different ecosystems

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Questions Related to adaptations to different ecosystems

Multiple choice botany adaptations to different ecosystems lichen lichens lichens ( the nature's pioneers )

During unfavourable conditions slime molds form spores which are survival for a long time, spore dispersal take place by

  1. Water currents

  2. Air currents

  3. Insects

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • Slime moulds are Saprophytic Protists.
  • They move along decaying twigs and leaves engulfing organic material. 
  • Under a suitable condition, they form aggregation called Plasmodium.
  • During unfavourable condition, the plasmodium differentiates and form fruiting bodies bearing spores at their tips.
  • The spores possess true walls.
  • They are extremely resistant and survive for many years even under adverse conditions. 
  • The spores are dispersed by air currents.
  • So, the correct answer is 'Air currents'.
Multiple choice botany adaptations to different ecosystems lichen lichens lichens ( the nature's pioneers )

A teacher explaining physical contact leading to equal physiological dependence between two thalloid forms was telling about

  1. Mycorrhizal association

  2. Establishment of heterothallism

  3. Operation of heterothallism

  4. Advent of lichen formation
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Lichens are formed by the physical association between fungal partner and the algal partner. The fungal partner acts as a mycobiont and algal partner acts as a phycobiont. In lichens, fungus grow around algae and provide bulk for their growth. The algae and fungus association is must for lichens to reproduce. So, they are physically dependent on each other. Here, both fungus and algae are in their thalloid forms.

So, option D is the correct answer.