usually because of an extreme and prolonged vitamin D deficiency. Rare inherited problems also can cause rickets. Vitamin D helps your child's body absorb calcium and phosphorus from food

SYLLABUS FOR POST- ASTT. TEACHER (L.T.)-SCIENCE SUBJECT- ZOOLOGY LEVEL- GRADUATE • Animal diversity- nonchordata, chordata. • Embryology, animal behavior • Applied zoology, toxicology • Ecology