A local laboratory analyzed a water sample and determined that it contained a total solid (TS) content of 132 mg/L and a conductivity of 112 μS/cm. The total suspended solid (TSS) content (mg/L) of water will be
The settling of discreet, non-flocculating particle in a dilute suspension is known as
Answer: Class-I sedimentation
The theoretical oxygen demand for a solution containing 500 mg/L of phenol will be
The compound p-dichlorobenze has been found to have KOM = 625. For a soil containing 1.6% organic matter, the distribution coefficient (Kd) will be
Removal of top fertile soil by water
The evolution of genetic resistance to antibiotics among disease-carrying bacteria is an example of
Answer: Directional natural selection
Pulmonary oedema is caused by
What is the half life of 131I ?
Chaparral, Maquis, Encinous, Melleseab are important areas of
Answer: Tropical evergreen woodland
The Keystone predator species maintain diversity in a community by
Answer: preying on community’s dominant species
Which of the following is not an external factor controlling an ecosystem ?
Which of the following food chain is correct ?
Answer: Phytoplankton → Zooplankton
→ Crab → Turtle
Which of the following is not categorized as an internal factor of an ecosystem ?
Two species cannot remain in same place according to
Freshwater ecosystems are nutritionally limited by
Answer: Phosphorous and Iron