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:
<em>Asexual Reproduction</em>
Explanation:
Reproduction is the process of producing new offspring by the parents. Reproduction is of two types namely, the sexual or asexual type. This is a character only possessed by living things.
Asexual reproduction is the type of reproduction that occurs with a single reproductive cell. The offspring produced in this type of reproduction looks the same as the single parent. Asexual reproduction comes in many forms namely;
- Binary fission
- Budding and;
- Fragmentation
Hello,
<span>Ice serves as a barrier between the water and the cold air above
Hope this helps</span>
