State true or false:
SCID is a primary immuno-deficiency.

Why is SCID called primary immunodeficiency?

State true (T) or false (F).

state true or false : Is 246 a perfect cube?

The human immuno deficiency virus is

Immuno - deficiencies are the diseases which occur due to impaired immune responses. These immuno - deficiencies may be primary or secondary. AIDS is a secondary immunodeficiency caused by a retrovirus Human Immunodeficiency Virus (HIV). Following diagram is that of HIV. Observe the diagram and answer the questions listed below the diagram : (i) State one difference primary immunodeficiency and secondary immunodeficiency. (ii) Why is HIV called a retrovirus? (iii) Identify the parts of the diagram labelled as A and B.

Assertion : SCID is a primary immunodeficiency. Reason : It is a serious congenital immunodeficiency.

State True or False: corr( x,x )= 1

State true or false. Phenolphthalein is a natural indicator .