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.
Answer:
F. The sequence of an animals' DNA is how scientist classify modern animals
Answer:
Explanation:
Alanine is the correct answer
<span>The appropriate justification of this is that B. As hydrilla is aquatic in nature, the roots do not have to search for minerals, and there is no need for xylem to absorb nutrients because the plant is surrounded by water that has dissolved nutrients in it. </span>
