Identify the plant part shown in the figure.

Which of the following diseases can be controlled by the use of vaccines?

$A$: Antibiotics like penicillin can be used to treat common cold.
$R$: Penicillin causes lysis of viral cells.

$A$ mentally sick person has:

What are lifestyle diseases? How are they caused? Name any two such diseases.

Read the following statements carefully and identify the incorrect statement$(s)$.
$(1)$ In $AIDS$,the count of $CD4$ cells increases.
$(2)$ Malignant tumors are cancerous tumors.
$(3)$ Pneumonia is a life-threatening disease.
$(4)$ Asthma can be caused by allergies.
$(5)$ Antibodies are made up of $\gamma$-globulin proteins.