Answer: Calcium
Explanation:
The Vitamin D is an important vitamin and it is related with the element calcium in the body. The Vitamin D is responsible for the absoprtion of calcium in the body present in the food. In the deficiency or depletion of the Vitamin D in the body is likely to affect the calcium levels. The calcium is the main element present in the bones and the teeth. Calcium helps to build bones. In the condition which involves the depletion of Vitamin D levels the calcium levels will also deplete. This will result in conditions like oesteoporosis, rickets and other bone deformities.
Thus people in the northern climates receiving low sunlight, will likely to receive low Vitamin D and will likely to develop bone related problems due to low calcium levels.
Answer:
The Recommended Dietary Allowances (RDA's)
Explanation:
Recommended Dietary Allowances are average intakes adequate to meet the nutritional needs of 97% to 98% of a healthy population. The values differ between sexes and for certain ages. Generally recommended dietary allowances indicate the intake of B vitamins, phosphorus, magnesium, iodine, copper, selenium, molybdenum, zinc, vitamins A, C and E. They may also indicate carbohydrate and protein intake. In summary, recommended dietary allowances are recommendations for the amounts of energy, nutrients, and other dietary components that healthy people must consume to stay healthy, reduce the risk of disease, and prevent deficiencies.
The effects of tobacco use on society include high taxes and loss of life. This statement is a fact. Loss of life is the biggest risk of tobacco usage because it causes certein diseases such as cancer to the user and to those around the user.
Answer:A
female gametophyte that has developed within a sporangium that has dispersed with the aid of additional protective sporophyte tissue layers
Explanation: An Ovule is made up of three parts: The integument, forming its outer layer, the nucellus (or remnant of the megasporangium), and the female gametophyte (formed from a haploid megaspore) in its center.
It is the structure that gives rise to and contains the female reproductive cells in seed plants.
