Question

The non-motile, greatly thickened asexual spores are called as
(a)Hypnospores
(b)Aplanospores
(c)Macro Zoospores
(d)Micro Zoospores

Answer 1

It's a family of chlorophyte which comprising of around 325 species every unicellular flagellate, that can be present in stale water and on damp soil, in seawater, freshwater, and even in snow as "snow algae". It is utilized as a model creature for molecular science, particularly investigations of flagellar motility and chloroplast elements, biogenesis, and hereditary qualities.

Complete answer:
Chlamydomonas may be a motile unicellular alga and belongs to the genus of chlorophyte. This is present in stale water, freshwater, seawater, moist soil, and even in snow. The production of spores results in the asexual reproduction in algae. According to that when zoospores lose their motility, these are referred to as aplanospores and in certain chlorophyte, these aplanospores have thickened dividers and are implied as hypnospores. These are resting spores delivered in the torpid state.

Additional Information: Chlamydomonas is cosmopolitan in freshwater or damp soil. It is generally found during a habitat rich in ammonium salt. It has red eye spots for photosensitivity and replicates both asexually and sexually.
Most species are obligate phototrophs but C. reinhardtii and C. dysostosis are facultative heterotrophs that will develop inside the dim inside the presence of acetic acid derivation as a carbon source.
So the correct answer is ‘Hypnospores’.

Note: Two anteriorly inserted whiplash flagella. Every flagellum starts from a basal granule inside the foremost papillate or non-papillate district of the cytoplasm. Every flagellum shows a regular 9+2 arrangement of the segment fibrils.
Contractile vacuoles are near the bases of flagella.
A prominent cup or bowl-shaped chloroplast is present.