Goblet cells are glandular cells, or unicellular mucus-secreting glands, present in the epithelial lining of the mucous membranes of the respiratory tract and digestive system. The mucus produced by a goblet cell is secreted in the light of the tubule in question by exocytosis and diluted with water in order to coat the epithelium exposed to harmful actions present in the digestive or respiratory tubes. [1] It has an important function of keep moist and avoid desiccation of the epithelium, particularly in the airways.
Comparing the DNA of two organisms can show how closely related two species are in terms of their evolutionary history (i.e. sharing a common ancestor). <span />
It's caused by the absence of an enzyme that helps break down fatty substances.
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So, they do eat...they do reproduce...they are simple...and can move.
So if you were lazy and skipped a type of food mentioned or anything, please ask the entire question, with all the included words. This way I can evaluate from how/the way they say it.