Microorganisms

Maximum alcohol will be obtained from
Hay is boiled in water and cooled. Some pond water, containing only heterotrophic protozoa, is added to it and kept in the dark for a long time. Which of the following statements regarding this is incorrect?
(i) The ecosystem may undergo succession but finally all organisms will die or go into resting stages.
(ii) Succession will occur, eventually reaching a steadystate in which energy flow is maintained.
(iii) The energy of the system will be maximum in the beginning.
(iv) Heterotrophic succession of protozoa will occur with increase in total biomass.
Pasteur effect is due to
Milk is changed into curd by
Which of the following infection in animals lead to the abortion?