4 because if you have a infection it causes you not to breath properly
Answer:
White shark bites, parasites, food availability, habitat degradation are among some of the contributing factors threatening the recovery of the species. The greatest threat to a sea otter is the oil spills.
Hope this helps!
Extra - Fun fact - Sea otters play a vital role in the health and stability of the nearshore marine ecosystem as a keystone species.
A cells relatively constant internal physical and chemical conditions are called Homeostasis.
Klinglers iron agar medium is used to find the enterobacteria which can ferment glucose , lactose and hydrogen Sulphide . They are H₂S producing bacteria .
This media have phenol red as an indicator. When the glucose is fermented to acid , the production of acid turn the indicator from red to yellow, but it is then reoxidised and turns red again . When lactose is fermented it produce large amount of acid , and turn indicator yellow . Hence the slant will become yellow.And combination of ferrous sulphate and sodium thiosulphate helps in detection of H₂S which produce black color at the butt .
Learn more about indicator at : brainly.com/question/20264817
#SPJ4
