what are hydrocarbon?write the name and the general formula of (i) saturated hydrocarbons, (ii) unsaturated hydrocarbons, and draw the structure of one hydrocarbons of each type.how can an unsaturateds hydrocarbon be made saturated?

Explain with the help of diagram how reflex action take place?

name the hormone secreted by thyroid gland and state its functions. why is it improtant for us to iodised salt in ourdeit name the disease caused due to deficiency of iodine and mention its symptoms

expand 3F, 4S- gland

examples of voluntary and involuntary actions