Multiple Choice QuestionsHigh value of BOD (Biochemical Oxygen Demand) indicates that
water is pure
water is highly polluted
water is less polluted
water is less polluted
The following graph depicts changes in two populations (A and B) of herbivores in a grassy field A possible reason for these changes is that:
both plant populations in this habitat decreased
population B competed more successfully for food than population A
population A produced more offspring than population B
population A produced more offspring than population B
Most animals are tree dwellers in a
coniferous forest
thorn woodland
temperature deciduous forest
temperature deciduous forest
Cryopreservation of gametes of threatened species in viable and fertile condition can be referred to as
In situ conservation of biodiversity
advanced exsitu conservation of biodiversity
in situ conservation by sacred groves
in situ conservation by sacred groves
Rachel Carson's famous book 'Silent Spring' is related to
pesticide pollution
noise pollution
population explosion
population explosion
Which of the following is not one of the prime health risks associated with greater UV radiation through the atmosphere due to depletion of stratospheric ozone?
Increased skin cancer
Reduced Immune System
Damage to eyes
Damage to eyes
Which one of the following matches is correct?
| Phytophthora | Aseptate mycelium | Basidiomycetes |
| Alternaria | Sexual reproduction | Deuteromycetes |
| Mucor | Reproduction by conjugation | Asocmycetes |
| Mucor | Reproduction by conjugation | Asocmycetes |
B.
| Alternaria | Sexual reproduction | Deuteromycetes |
(i) Phytophthora belongs to Phycomycetes (algal fungi). They contain either unicellular thallus or non-separate coenocytic mycelium. They are mostly plant damaging Oomycetes (water molds).
(ii) Alternaria is Deuteromycetes (fungi imperfecti), which lacks sexual reproduction.
(iii) Mucor also belong to Phycomycetes. They have mycelium which is coenocytic (multinucleate) and profusely branched. They reproduce vegetatively via conjugation.
(iv) Agaricus belongs to Basidiomycetes (where karyogamy and meiosis occur). They contain well-developed filaments, branched and septate mycelium. They are saprophytic but parasitic.
So, hence (b) option is correctly matched.
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