1. 10-20 dB
2. 30-60 dB
3. 70-90 dB
4. 120-150 dB
30-60 dB
1. Hydrilla
2. Water hyacinth
3. Larva of stone fly
4. Blue-green algae
Larva of stone fly
1. India
2. France
3. USA
4. Britain
USA
1. First trophic level (T1)
2. Second trophic level (T2)
3. Third trophic level (T3)
4. Fourth trophic level (T4)
First trophic level (T1)
1. Allen's law
2. Mendel's law
3. Gause's competitive exclusion principal
4. Weismann's theory
Gause's competitive exclusion principal
1. Proteases
2. α-amylases
3. Hydrolases
4. Peroxidases
Hydrolases
1. excess of STH
2. excess of thyroxin
3. deficiency of thyroxin
4. excess of adrenaline
excess of STH
1. protective resemblance with the surroundings
2. defensive adaptation of skin against ultraviolet radiations
3. drug resistance
4. darkening of skin due to smoke from industries
protective resemblance with the surroundings
1. UV rays
2. visible rays
3. infra-red rays
4. X-rays
UV rays
1. Selaginella
2. Metasequoia
3. Pinus
4. Cycas
Cycas