Why is a high-dose flu shot available for people 65 and older? As people get older, their natural immune defenses can weaken and they can get sick more easily. The high-dose flu shot contains four times more antigen (active ingredient) than a regular flu shot. This helps older people develop a better immune response, gives better protection against the flu and also helps prevent flu-related complications.
Dogfish sharks are fish; fish are vertebrates, and all vertebrates have bilateral symmetry. This means they have symmetry across one plane (known as the sagittal plane, and directly down the centre of their body), which means one side of their body approximately mirrors the other side.n the northeast Pacific Ocean estimates of the age at maturity for female spiny dogfish have ranged from 20 years and 3 feet (92cm) to 35.5 years and 3.1 feet (94cm. 2 people found this useful.
Amazing Starfish Facts For Kids . The evolutionary ancestors of starfish are considered to be echinoderms and are thought to have had bilateral symmetry. Modern starfish have bilateral symmetry in their larval phase. Starfish have five arms and rays that spread out from a central disc. Nonetheless, numerous starfish species have more than six arms. There are few species that exhibit 10 â 15 arms, with the maximum can reach up to 50. They have quite a few structures at their body surfaces that consist of simple anatomy of the animal and can for a while support in its identification.