A long-term user of cocaine may well develop symptoms of other psychological disorders, such as:

Q. is a psychological attachment to certain effects such as euphoria and a temporary feeling of well-being associated with drugs and alcohol.

Q. Recessive mutations in some rare genetic disorders can manifest as disease. A couple had four sons and four daughters, of which two sons developed such a genetic disorder. The parents did not manifest disease symptoms. Further studies shows that this disease affects only males. If genes $P$ (dominant allele) and $p$ (recessive allele) are involved in this disorder, identify the correct statement from the options given below.

Q. An embryo may sometimes develop from any cell of embryo sac other than egg. It is termed as

Q. Write the name of four respiratory disorders with symptoms.

Q.

In an autosomal recessive disorder, two copies of an abnormal gene must be present in order for the symptoms of the disease to develop.