Answer:
Missed period
Explanation:
Symptoms of early pregnancy can include a missed period, an increased need to urinate, swollen and tender breasts, fatigue, and morning sickness
Answer:
Erika is a vegan. To avoid developing a serious nutritional deficiency, she needs to include a source of vitamin B-12 in her diet.
Explanation:
Vitamin B12 is a nutrient that helps keep your body's blood and nerve cells healthy.
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Answer:
option c. Urea
Explanation:
Composition of normal urine is mostly water salts and other chemicals like uric acid, etc. about 95% of water is present in urine
Urea is one of the component produced in the metabolical activities of amino acid as the waste product of nitrogenous substances substance that is produced by amino acid metabolism.
Significant band high amount of urea in urine is an indicates that the kidneys are not functioning well or are an indication of Kidney failures and implies impairment in glomerular filtration.
Answer:
Calcium
Explanation:
Calcium is an important element present in the organisms body. The calcium can acts as an important messenger molecule and helps in the process of muscle contraction.
The concentration of calcium ions in the myoplasm leads to the development of force necessary for the movement of actin and myosin molecule. The calcium ions cling the cross bridge formation during muscle contraction.
Thus, the correct answer is option (b).