3 - Exposure to radiation
Radiation ionises cells and can cause mutations in genes.
The rest of the options have no affect on genetics at all, merely a temporary affect on the physical aspects of the body, such as heart rate etc.
Answer:
Peter should be able to listen to music.
Explanation:
Peter should be allowed to listen to music because if he insists that it helps him to focus, then so be it.
Answer:
As humans we are part of ecosystems; we interact with the environment and other species, even though it may not always be for the better. We mostly are destroying ecosystems through activities like deforestation, overfishing, etc. We are also a consumer in all food chains/food webs.
Smooth muscles are the type of muscle that contracts and relax to control the movement of the contents.
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What are Smooth muscles?
Because it lacks sarcomeres and as a result, striations, smooth muscle is an involuntary non-striated muscle (bands or stripes). Its two subgroups are single-unit smooth muscle and multi-unit smooth muscle. A syncytium is the collective contraction of the sheet or bundle of smooth muscle cells that make up a single-unit muscle.
Smooth muscle makes up the walls of hollow organs including the stomach, intestines, bladder, and uterus as well as the blood and lymphatic vessels, as well as the tracts of the respiratory, urinary, and reproductive systems. The ciliary muscle, a type of smooth muscle present in the eyes, changes the shape of the lens by dilation and contraction of the iris.
To learn more about smooth muscles, visit:
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