The most abundant prokaryotes helpful to humans in making curd from milk and in production of antibiotics are the ones categorised as
Cyanobacteria
Archaebactera
Chemosynthetic autotrophs
Chemosynthetic autotrophs
Which of the following is responsible for peat formation?
Marchantia
Riccia
Funaria
Funaria
Pick up the wrong statement
Cell wall is absent in Animalia
Protis ta have photosyn thetic and heterotrophic modes of nutrition
Some fungi are edible
Some fungi are edible
Choose the wrong statement
Penicillium is multicellular and produces antibiotics
Neurospora is used in the study of biochemical genetics
Morels and truffles are poisonous mushrooms
Morels and truffles are poisonous mushrooms
Archaebacteria differ from eubacteria in
cell membrane structure
mode of nutrition
cell shape
cell shape
Dr F went noted that if coleoptile tips were removed and placed on agar for one hour, the agar would produce a bending when placed on one side of freshly cut coleoptile stumps. Of what significance is this experiment?
It made possible the isolation and exact identification of auxin
It is the basis for quantitative determination of small amounts of growth - promoting substances
It supports the hypothesis that IAA is auxin
It supports the hypothesis that IAA is auxin
Which of the following are most suitable indicators of SO2 pollution in the environment?
Lichens
Conifers
Algae
Algae
In which group of organisms the cell walls form two thin overlapping shells which fit together?
Chrysophytes
Euglenoids
Dinoflagellates
Dinoflagellates
Viruses have
DNA enclosed in a protein coat
prokaryotic nucleus
single chromosome
single chromosome
