"seral" - 1 õppematerjal

Inglise keel unit 5 answers

IVF, PGD, PGH, AI(D), amniocentesis, CVS, karyotype, false positive, false negative [15] 124. (i) natural change in species composition (in an area) ; ref to directional change ; ref to named examples in the diagram (either species or category) ; over a period of time ; a number of recognisable stages / seres / seral stages ; one sere changes the conditions for the next ; e.g. depth of soil increases / soil stabilisation ; leads to a climax community ; creation of niches ; ref to nitrogen fixation ; AVP ; e.g. pioneer species 4 max (ii) development of deeper soil ; soil, becomes rich in humus / has more nutrients / is more fertile ;