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.
Reflection and rotational symmetry together A shape can have no lines of symmetry, but its order of symmetry must be at least one. For regular polygons, the number of lines of symmetry is equal to the order of rotational symmetry, and both are equal to the number of sides.For example, a pentagon has five sides, five lines of symmetry and an order of rotational symmetry of five.The order of rotational symmetry of a shape is always equal to or greater than the number of lines of symmetry it has. Consider the shapes below.here is a number called the order of rotational symmetry. This is how many times the shape looks the same as it is rotated through 360Â°. Shown below are the stages of rotating an equilateral triangle through 360Â°. Each triangle is rotated 30Â° clockwise from the one to its left.