Subject :NSO Class : Class 8
Study the given dichotomous key and select the correct option.
I. a. It is a unicellular organism - go to II
b. It is multicellular organism - go to III
II. a. It contains chlorophyll - P
b. It does not contain chlorophyll - Q
III. a. It is used in production of antibiotics - R
b. It decomposes the organic waste and dead
plants and animals - S
AP could be Spirogyra whereas Q could be Rhizopus.
BR could be Penicillium whereas S could be diatoms.
CP could be Chlamydomonas whereas R could be
Streptomyces.
DNone of these