EVERYDAY SCIENCE

Detailed explanation-1: -No, not really. Instead, they have cells called receptors that can sense whether it’s light or dark.

Detailed explanation-2: -Tiny roundworms called Caenorhabditis elegans don’t have eyes, but that won’t stop them from picking a least-favorite color. New research shows that C. elegans can sense and avoid the color blue even though they lack even the most basic light-sensing systems, Veronique Greenwood reports for the New York Times.

Detailed explanation-3: -In some species, the segments break off with the eggs to pass through the intestines of the host in their poop. The segments look like little grains of white rice. Segments in poop are often the first visible sign of a tapeworm infection.

Detailed explanation-4: -Tapeworms do not have a digestive tract. Instead, they absorb their nutrients from the gut contents of the host directly through their outside surface, tegument. New proglottids are constantly formed in the neck of the worm and along the length of the tapeworm they mature.