B.Prokaryotic cells do not have a true nucleus or membrane-bound organelles.
They developed to be protected by the hard shell from parasites and ther predators.
17) cerebellum
18) temporal lobe
iam sorry about the others their answers are not in the paragraph
When a scientific experiment is carried out in a controlled setting, all variables are kept the same except for the C. experimental. Experimental variables are the things you are studying in the experiment and it is the only variable you can change.
Small herbivorous fish would occupy the role of a C. primary consumer. Primary consumers consume primary producers, and primary consumers are then consumed by secondary consumers. Once secondary consumers die, they are consumed oftentimes by decomposers.
Hope this helps!