Which of the following organisms is not nekton? a. Whales
b. Crabs (answer)
c. Sharks
d. Dolphins
Answer:
A volcano
Explanation:
Is a vent or fissure in the Earth's surface through which molten rock and gases are expelled. Molten rock is called magma.
The period during which the presence of stromatolites decline is the Proterzoic period. Stromatolites are widely distributed sedimentary structures consisting of laminated carbonate or silicate rocks, produced over geologic time by the trapping, binding, or the precipitating of sediment by groups of microorganisms, primarily cyanobacteria.
The least reactive element in the third period is argon.
The water cycle is also referred to as the hydrologic cycle.
