207.WHAT IS A TAPEWORM?
This certainly isn’t a pleasant subject, but many people suffer from tapeworm and so there is great curiosity about it. A kind of flatworm, the tapeworm is an intestinal parasite.
This means that it lives in the digestive tract of another animal, called the host, and is fed by food which the host has partly digested.
206.WHAT IS A PARASITE?
Sometimes you hear people say they don’t want to live like parasites; they want to make their own way. A parasite lives with, in, or on another organism, the “host.”
All living things depend on one another. But the parasite lives with another organism in a very special way. The parasite takes from the host and gives it nothing in return!
204.WHAT ARE GENES?
Before a child is born, we can predict many of the biological characteristics of the child by observing the parents. This is because we know the laws of heredity.
For example, if one parent has brown eyes and the other has blue eyes, the child will be brown-eyed. If neither parent has any brown pigment in the ring around the pupil, the child also will have pure blue eyes. If one of the parents has curly hair, then the child will have an even chance of having curly hair.
