How does pollution affect marine life?
a. pollution causes a decrease in phytoplankton populations and therefore a decrease in the occurrence of algal blooms.
b. pollution causes destruction of coral reefs, which are important sources of shelter and breeding for marine animals.
c. soaps, detergents, and plastics in the ocean decrease the acidity of ocean water, leading to a decrease in carbonate levels.
d. pollution affects organisms close to the shoreline, but does not affect marine organisms far from the shore.?

b. pollution causes destruction of coral reefs, which are important sources of shelter and breeding for marine animals

Explanation:

Some of the air pollutants like carbon dioxide, carbon monoxide and sulfuric acid mixes with the marine water also the solid waste materials which are discharge in water and oil spill also contaminate the quality of marine water.  The pollutants directly influence the life of the marine animals. They cause destruction of the coral reefs. Water pollutants such as fertilizers, oils, animal wastes can block the sunlight reaching the reef. This can cause coral bleaching which may occur due to the removal of the algal colony living in symbiotic association with the coral polyp. The poisonous pollutants can kill the coral polyps and this will leave many marine creatures devoid of shelter. Hence, some marine species will not be able to  copulate and reproduce. Thus they may become extinct.

B

Explanation:

Took the test.

a mercury barometer is a device that uses the physical properties of mercury in a tube to measure barometric pressure. mercury barometers are used for : -

1. measurement of atmospheric pressure  

2. determining the altitude of a place

3. weather forecasting

4. calibration and checking of aneroid barometers

5. application in fluid mechanics

6. measurement of pressure in aircrafts

7. surface weather analysis

8. preparation of barographs

9. usage in physical sciences like physics, astronomy & chemistry

10. preparation of aircraft altimeters

characteristics of mercury barometer : -

1.used to define and measure atmospheric pressure.

2.on the average at sea level the column of mercury rises to a height of about 760 mm.

3.this quantity is equal to 1 atmosphere.

4.it is also known as standard atmospheric pressure.

5.a barometer in which the weight of a column of mercury in a glass tube with a sealed top is balanced against that of the atmosphere pressing on an exposed cistern of mercury at the base of the mercury column, the height of the column varying with atmospheric pressure.