Answer:
a
Explanation:
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People used vaccines to reduce the risk of infection by working with body as defenses to help them so this vaccines develop immunity to disease
I hope that's help:0
The answer is community. A community is a group of people living in the same place.
Answer:
The Z lines and H- zone shortens during the muscle contraction.
Explanation:
Sarcomere is the area between the two Z lines. The Z- lines are present in the centre of I - band and H - zone is present in the A - band. The actin filaments which are thin filaments present in I- band and contracts, slide over the myosin filament during contraction.
The I - band, H- zones are became shortens as they are thin than the A- band. It is anisotropic band having thick myosin filaments. They are not flexible and remain in its constant shape during the muscle contraction.
After the muscle contraction, the A- band and the H- zone comes to their original shape. In other words, the sarcomere shortens and comes back during muscle contraction, and relaxation.
No. Scientists have never predicted a earthquake. We do not know how, and we do not expect to know how any time in the foreseeable future.
