Answer:
Each time your heart beats, an electrical signal travels through the heart. An EKG can show if your heart is beating at a normal rate and strength. It also helps show the size and position of your heart's chambers. An abnormal EKG can be a sign of heart disease or damage.
Although not completely proven, it's true some researchers suggest that consumption of large amounts of caffeine can result in cancers of the bladder, ovaries, colon, and kidneys.
<h3>How caffeine effect body ?</h3>
The body readily absorbs caffeine, and the short-term effects often manifest between five and thirty minutes after consumption. Increased breathing, heart rate, mental and physical vigor, as well as increased heart rate, are examples of these impacts. The duration of these effects varies from person to person and can reach 12 hours.
As little as 300 milligrams of caffeine, or about four cups of coffee, can raise your risk of experiencing adverse effects like nausea, anxiety, restlessness, and insomnia in adults. Caffeine misuse or excessive use in some individuals can also result in: Headaches. Irritability.
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Answer:
Following are the evidences that support human evolution by natural selection:
i) Biogeography
ii)The fossil record
iii) Molecular Biology
Explanation:
i) Biogeography: it was the geographical distribution of species that was first suggested the idea of evolution to Darwin.
ii) The fossil Record: The succession of fossil forms is strong evidence in a favor of evolution. It provides a visual record in a complete series showing the evolution of an organism.
iii) Molecular biology: Evolutionary relationships among species are reflected in their DNA and proteins, in their genes and gene products.
