Among bryophytes, lichens and fern which one is pioneer species in xeric succession?

Which of the following is a pioneer in xerarch succession?

Among the crustose, foliose and fructose lichens, which one is a pioneer species?

Among the following edible fishes, which one is a marine fish having rich source of omega-3 fatty acids ?

Select the correct match sedimentary nutrient -Nitrogen cycle Pioneer species-Lichens Secondary succession-Burnt forests Pyramid of Biomass in sea -upright

Among the following, which one is not a deutrerostome?

Among the following, which one is a wrong statement?

Which one of the following is a pair of endangered species?

In primary succession on rocks, the pioneer species are usually