Answer:
B. Cartilaginous fish
Explanation:
Sharks have a cartilaginous skeleton. Cartilage is less dense than bone which allows sharks to move quickly through the water without using too much energy.
Difference between nitrification and dentrification
Explanation:
Nitrification and denitrification are part of the nitrogen cycle
Nitrification is the process of conversion of ammonium to nitrate by nitrifying bacteria like Nitrobacter and Nitrosomonas
Denitrification is the process of reduction of nitrate to nitrogen gas by denitrifying bacteria like Pseudomonos, Lactobacillus etc.
Nitrifying bacteria are autotrophs and grows slowly and need aerobic condition. Denitrifying bacteria are hetertrophs and grows rapidly and need anaerobic conditions.
Nitrification requires a pH of about 6.5 to 8.0; denitrification takes place at 7.0 to 8.5
Nitrification provides soluble nitrates readily available in the soil to be easily absorbed by the roots.
Denitrification processes are used in wastewater or effluent treatment plants.
Answer:
Which data help hydrologists predict floods?
Impermeable land area
Snowpack
Explanation:
Impermeable land area
, Snowpack
The above factors are very essential to an hydrologist to predict floods though other factors such as topography, drainage among others are also inclusive to make the prediction rightly.
Answer:
Gravity, electricity, and magnetism are considered non-contact forces because they do not physically act on objects.
Explanation:
Gravity, magnetism, and electricity all use fields to act on objects without actually touching them. They can all force objects to move without touching them through these fields.
Answer:
Tropic of Cancer marks the northern edge. Tropic of Capricorn marks the southern edge.
Explanation:
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