Tag: adaptations to different ecosystems

Questions Related to adaptations to different ecosystems

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

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

  1. Water currents

  2. Air currents

  3. Insects

  4. None of these

Show answer
Correct Option: A
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'.

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

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

  1. Mycorrhizal association

  2. Establishment of heterothallism

  3. Operation of heterothallism

  4. Advent of lichen formation

Show answer
Correct Option: D
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.