Dengue causes decrease in number of _______in blood.

Decrease in number of leucocytes .

Decrease in number of thrombocytes .

Decrease in number of erthrocytes .

Dwarfism is caused by decreased secretion of __________ in children.

Some human diseases are transmitted only through blood in one of such diseases, there is a progressive decrease in the number of lymphocytes of the patient. (a) Name the disease and its causative agent. (b) Write any two symtoms of it.

Diabetes mellitus decreases the sugar level of blood.

Cork is impervious to water due to the presence of _______in its cell wall.

Decrease in blood pressure is termed _____.

Which of the following is a correct sequence of decreasing order of number of species?