Cellulose digesting zooflagellate found in wood cockroaches is
Question 12 Cellulose-rich food substances are good source of roughage in human beings because (a) Human beings do not have cellulose-digesting enzymes (b) Cellulose gets absorbed in the human blood and converts into fibres. (c) The cellulose-digesting bacteria convert cellulose into fibres. (d) Cellulose breaks down into smaller components which are egested as roughage.