Biological Classification Ques 101
101. Auxopores and hormocysts are formed, respectively, by:
(a) Some diatoms and several cyanobacteria
(b) Some cyanobacteria and diatoms
(c) Several cyanobacteria and several diatoms
(d) Several diatoms and a few cyanobacteria.
Show Answer
Answer : d
Hints & Solutions
(d) Binary fission in diatoms reduces the size of most daughters which is corrected through the development of auxospores. In some filamentous cyanobacterial forms unisexual reproduction occurs by hormogonia (hormocysts). They are identified by presence of biconcave (one disk or separation disc between two adjacent cells e.g. Oscillatoria).
BETA
