Guide

Can Cigarette Smoke Make You Sick? | Signs, Causes, Safer Steps

Breathing tobacco smoke can cause nausea, headache, cough, and throat burn within minutes, and repeat exposure raises longer-term health risks. You walk into a room where someone’s been smoking and your stomach flips. Your eyes sting. Your chest feels tight. You wonder if it’s “just the smell” or if smoke can actually make you feel […]

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Are Protozoans Unicellular? | Clear Facts Without Confusion

Yes, protozoans are single-celled eukaryotes, so one cell handles feeding, movement, and reproduction. People use “protozoa” in two ways. In older biology texts it means “animal-like protists.” In modern classification, many biologists avoid the term because it groups lineages that are not close relatives. Still, when a teacher, traveler, or lab report says “protozoan,” they

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