our thyroid glands plays a main role in a human body. It secretes thyroxine and calcitonin. In which thyroxine help in growth and cellular metabolism and calcitonin helps to regulates calcium concentration in blood . If thyroid gland stops working then there is low level of calcium in our blood, which leads to mental and hormonal disorder. In this way a person's blood calcium level would be affected if his/her thyroid gland stops working.
Answer:
a. vitamin d and vitamin b12
Explanation:
Vitamins are groups of organic compounds that are essential in small quantities for healthy human growth, metabolism, development, and body function. Vitamins are found in plants and animal foods or sometimes produced synthetically. Deficiencies of specific vitamins produce specific disorders. Vitamin d and vitamin b12 are important vitamins that the body needs. The body produces vitamin D when the skin is exposed to sunlight and it is very essential for strong bones, while vitamin b12 is naturally present in meats. Deficiency of vitamin d in the body can result in bone problems (including teeth) and it has also been linked to depression. Vitamin b12 deficiency can also affect mental functions by causing disorientation, memory loss, depression and confusion.
From the question, the elderly woman may be developing a deficiency of vitamin d and vitamin b12.
According to the given information, the animals belong to reptiles.
<h3>What are the characteristics of reptiles?</h3>
- The class reptiles are cold-blooded animals which means that the temperature of their body changes according to the surrounding temperature.
- They mostly lay eggs and in some cases, the eggs are hatched by the females inside the water.
- Their body has scales or plates to protect themselves from predators. They live on land and in water for some time and respire using their lungs.
Thus, the animals belong to reptiles.
To learn more about reptiles click here:
brainly.com/question/10649956
Answer:
3. sexual selection
Explanation:
Because artificial selection is the one made by humans like dog breeds.
Disruptive selection is when extreme values for a trait in a population are favored like big and small sizes. Stabilizing is when the trait is pushed towards the average. Sexual selection is when the trait aids in competition among individuals for access to preferred mates.
Cells get energy for their functioning through sunlight and other organic food molecules. ATP is a good example of energy pathways through photosynthesis.