(a) What is pioneer species ?
(b) write the name of pioneer species in xerach succession.
(c) Write the name of various serial stages.

What are ‘pioneer species’? Give two examples of them.

The pioneer species in xerarch and hydrach succession, are respectively:

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

(c) Write the IUPAC name of the following

Write down the name of parts A, B, C and D

Name the pioneer species that invade in primary succession on bare rock and in water.

(a) What is "population" according to you as a biology student ? (b) "The size of a population for any species is not a static parameter." Justify the statement with specific reference to fluctuations in the population density of a region in a given periods of time. OR (a ) What is hydrarch succession ? (b) Compare the pioneer species and climax communities of hydrarch and xerarch succession respectively. (c) List the factors upon which the type of invading pioneer species depend in secondary hydrarch succession. Why is the rate of this succession faster than that of primary succession ?

Write down the name of A, B, C and D