Multiple Choice QuestionsDr 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
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
Viruses have
DNA enclosed in a protein coat
prokaryotic nucleus
single chromosome
single chromosome
Which statement is wrong for viruses?
All are parasites
All of them have helical symmetry
They have ability to synthesize nucleic acids and proteins
They have ability to synthesize nucleic acids and proteins
Which one of the following is common to multicellular fungi, filamentous algae and protonema of mosses?
Diplontic life style
Members of kingdom-Plantae
Mode of nutrition
Mode of nutrition
Maximum nutritional diversity is found in the group
Fungi
Animalia
Monera
Monera
C.
Monera
Maximum nutritional diversity is shown by the members of kingdom - Monera. Some of them are autotrophic (e.g. photosynthetic autotrophic or chemosynthetic autotrophic) while the vast majority are heterotrophs (e.g., saprotrophic or parasitic). Ecologically, these may be producers or decomposers.
How many organisms in the list given below are autotrophs?
Lactobacillus, Nostoc, Chara, Nitrosomonas, Nitrobacter, Streptomyces, Sacharomyces, Trypanosoma, Porphyra, Walfia.
Four
Five
Six
Six
Switch
