Answer:
Explanation:
Osteoporosis is a disease of bones. It occurs when bones loose density and structure of bone becomes porous. This condition leads to weaking of bones and the bones may break.
Causes : The low calcium diet in food, estrogen deficiency in women, Vitamin D deficiency and high levels of thyroid hormone secretion, too much alcohol consumption, smoking and medical condition of cystic fibrosis also result in bone weakening are responsible causes of osteoporosis.
Prevention : It can be prevented by medication, weight bearing physical exercises which can prevent loss of bones and provide strength, healthy diet with calcium and Vitamin D supplements.
Due to the semi solid or solid ground substance that accumulates in the matrix
Answer:
Self fertilization is pretty self explanatory. If you're talking about plants then it is the ability to fertilize/reproduce on its own. But for cross fertilization (for a plant), requires a support from another plant (cross pollination), in order to be fertile/reproduce
Answer:
C
Explanation:
eukaryotic cells do have a nucleus, so it would be wrong to say that they don't have a nucleus.
