Challenger App

No.1 PSC Learning App

1M+ Downloads
What is the salt content range for brackish water bodies and estuaries?

ALess than 5 ppt

B35 ppt or above

CExactly 3.5 per cent

DBetween 5 and 35 ppt

Answer:

D. Between 5 and 35 ppt

Read Explanation:

  • The salt content of fresh bodies is very low, always less than 5 ppt (parts per thousand)

  • The water bodies containing salt concentration equal to or above that of sea water (i.e., 35 ppt or above) are called as saline water bodies or marine water bodies.

  • Estuaries and brackish water bodies have salt content between 5 to 35 ppt.


Related Questions:

Protecting biodiversity within its natural habitat is known as:
The term 'Ecology' is derived from which two Greek words?

Which among the following statements are correct?

(i) Eco system restoration was the theme of World Environment Day of the year 2021.

(ii) Pakistan served the global host for World Environment Day 2021

(iii) Ecosystem restoration means a process of reversing the damage caused to the ecosystem and help in its recovery.

Which of the following statements accurately describe summer stratification in temperate lakes?

  1. Summer stratification is pronounced in temperate lakes due to the rapid mixing of water layers.
  2. Temperate lakes retain well-defined temperature layers that do not mix rapidly during summer.
  3. Tropical lakes exhibit pronounced summer stratification because their layers mix slowly.
  4. Summer stratification is rare in deep tropical lakes.

    Which of the following statements correctly describe trophic organization and levels within an ecosystem?

    1. Trophic organization represents the pattern of food relationships in an ecosystem.
    2. Producers, such as green plants, always occupy the first trophic level.
    3. Herbivores, which feed on producers, are positioned at the third trophic level.
    4. Trophic levels sequentially represent different feeding positions from producers to top consumers.