Biology
The kidneys are stimulated to produce renin

By a decrease in the blood pressure
When the specific gravity of urine rises above 1.10
When the pH of the urine decreases
When the peritubular capillaries are dilated

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Biology
In test tube baby

Development of ova take place in test tube without fertilization
Fertilization of ova and development takes place in test tube
Fertilization takes place in uterus while development takes place in test tube
Fertilization of ova takes place in test tube which development of embryo occur in uterus

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