They used constellations for directions. basically the would find there way through the night by looking at the stars. for example they would look at the north star to go north.
We’re is the rest of the question I don’t see it but option brb
Answer:
Scientists discovered mechanisms that protect tapeworms from being digested by their host. ... They also needed a mechanism to protect themselves from intestinal substances, specifically from digestive enzymes. One of such enzymes called trypsin breaks down proteins.
Explanation:
For example:Parasites can hide away from the immune system by invading immune-privileged tissue such as the central nervous system or the eye (Bhopale 2003). Also some parasitoids place their eggs inside tissue such as the fat body that is not well patrolled by the host's immune system
Correct answer: D). Immune response to bacterial toxins
The cut is red and inflamed because the white blood cells of our body is trying to protect the affected area from the infection. It is a guarding us from the harmful viruses and bacteria.
During infection some chemicals are released from the white blood cells to the site of infection and that substance is responsible for causing redness and inflammation of the wound.It is the first sign of infection.
Hence, the correct answer would be option D.