The correct answer is b. The kingdom classification system can change based on the discovery of new information and organisms.
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The kingdom is taxonomic rank, below domain which is divided into smaller groups called phyla. Different kinds of proposed classification changed over time and at the moment the kingdom-level classification of life includes Bacteria, Archea, Protozoa, Chromista, Plantae, Fungi and Animalia.</span>
A prokaryotic cell does NOT have a membrane. Eukaryotic does on the other hand. A great example of a Prokaryotic cell is bacteria.
photosynthesis is the process
A condition in which the issue connecting muscle to bone becomes inflamed.
Freeze thaw occurs on the mountain creating large chunks of rock which progress down stream. However a more logical answer would be calving,abrasion and plucking that are processes performed by a glacier removing peices of rock from the mountains. As these melt they form streams, large rocks and boulders would be left behind.