मराठी
कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

Algal blooms impart a distinct colour to water due to ______. - Biology

Advertisements
Advertisements

प्रश्न

Algal blooms impart a distinct colour to water due to ______.

पर्याय

  • their pigments

  • excretion of coloured substances

  • formation of coloured chemicals in water facilitated by physiological degradation of algae

  • absorption of light by algal cell wall

MCQ
रिकाम्या जागा भरा
Advertisements

उत्तर

Algal blooms impart a distinct colour to water due to their pigments.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 16: Environmental Issues - MULTIPLE CHOICE QUESTIONS [पृष्ठ ११६]

APPEARS IN

एनसीईआरटी एक्झांप्लर Biology [English] Class 12
पाठ 16 Environmental Issues
MULTIPLE CHOICE QUESTIONS | Q 20. | पृष्ठ ११६

व्हिडिओ ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्‍न

What are the various constituents of domestic sewage?


Public all over India is very much concerned about the deteriorating air quality in large parts of North India. Alarmed by this situation the Resident’s Welfare Association of your locality organized an awareness programme entitled “Bury not burn”. They invited you, being a biology student to participate.

  1. How would you justify your arguments that promote burying and discourage burning? (Give two reasons)
  2. With the help of flow charts, one for each practice depict the chain of events that follow.

Lichens indicate SO2 pollution because they ______.


Algal bloom results in ______.


A high Biological oxygen demand (BOD) indicates that ______.


World’s most problematic aquatic weed is ______.


Which of the following exhibits biomagnification?


Which one of the following impurities is easiest to remove from wastewater?


Name an industry which can cause both air and thermal pollution and as well as eutrophication.


What is an algal bloom?


What do you understand by biomagnification?


What are the three major kinds of impurities in domestic wastewater?


Is it true that if the dissolved oxygen level drops to zero, the water will become septic. Give an example which could lower the dissolved oxygen content of an aquatic body.


Observe figure and answer the following questions.

Biomagnification of DDT in an aquatic food chain

  1. What ecological term is used to describe the DDT accumulation at different trophic levels?
  2. List any one effect of DDT accumulation on birds
  3. Will DDT accumulation lead to eutrophication?
  4. Does it affect the BOD?
  5. Name disease caused by accumulation of any heavy metal.

Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×