Biology
What is the main purpose of white blood corpuscles?

To give strength
To carry oxygen
To carry nutrients
To combat infection

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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 of ova takes place in test tube which development of embryo occur in uterus
Fertilization takes place in uterus while development takes place in test tube

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