1. The cause of red snow is :
(6) Ulothrix zona
(d) none of abov.
(a) Volvox globator
(c) Chlamydomonas nivalis
2. The life-cycle of Ulothrix is :
(a) haplontic
(c) haplobiontic
(b) diplontic
(d) diplobiontic
3. Volvox colonies are found in
(b) salt lakes
(d) water falls
4.
(a) fresh water ponds
(c) sea water
The structure of Volvox is:
(a) Unicellular
(c) thalloid
(b) filamentous
(d) colonial
Answers
1.Chlamydomonas nivalis, a species of green algae containing a secondary red carotenoid pigment (astaxanthin) in addition to chlorophyll.
2.Ulothrix chiefly reproduces vegetatively by fragmentation, asexually by nonmotile resting spores (aplanospores) and motile quadriflagellate spores (zoospores), and sexually by biflagellate gametes. Thus, this is how the lifecycle of Ulothrix has a continuous flow
3.Found in puddles, ditches, shallow ponds and bogs, Volvox colonies reach up to 50,000 cells and may include daughter and granddaughter colonies
4.Volvox form spherical or oval hollow colonies that contain some 500 to 60,000 cells embedded in a gelatinous wall and that are often just visible with the naked eye. Colonies of Volvox globator contain thousands of individual cells. Each cell usually has two flagella that propel it through substances such as water.