Qaysi suvo`tlar suvda qalqib turadi (1), qaysilari suv tagidagi narsalarga yopishib o`sadi (2)?
a) ulotriks; b) spirogira; c) laminariya.

1. 1 a, b; 2 c
2. 1 a, c; 2 b
3. 1 b, c; 2 a
4. 1 b; 2 a, c