Please select a subject first
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All veins carry deoxygenated blood.
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What is the shape of RBC in human blood?
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Why is the colour of the blood-red?
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Who discovered the Rh factor? Why was it named so?
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Mature RBC in mammals does not have cell organelles.
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Why are leucocytes classified as granulocytes and agranulocytes? Name each cell and mention its functions.
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Direction: In each of the following questions a statement of assertion (A) is given and a corresponding statement of Reason (R) is given just below it. Mark the correct statement as.
Assertion: RBC plays an important role in the transport of respiratory gases.
Reason: RBC does not have cell organelles and a nucleus.
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Direction: In each of the following questions a statement of assertion (A) is given and a corresponding statement of Reason (R) is given just below it. Mark the correct statement as.
Assertion: Persons with AB blood group are called a universal recipient because they can receive blood from all groups.
Reason: Antibodies are absent in persons with AB blood group.
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Fertilization is ______ in humans.
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______ is the first secretion from the mammary gland after childbirth.
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Prolactin is a hormone produced by ______.
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Match the following terms with their respective meanings.
| a) Parturition | - | 1) The duration between pregnancy and birth |
| b) Gestation | - | 2) Attachment of zygote to the endometrium |
| c) Ovulation | - | 3) Delivery of baby from a uterus |
| d) Implantation | - | 4) Release of an egg from Graafian follicle |
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What is colostrum? How is milk production hormonally regulated?
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How does a developing embryo get its nourishment inside the mother's body?
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Name the hormone responsible for the vigorous contractions of the uterine muscles.
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LH is secreted by the posterior pituitary.
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Describe rocket propulsion.
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Which of the following statements is wrong about detergents?
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Answer the following question using the data given below:
Assertion: Detergents are more effective cleansing agents than soaps in hard water.
Reason: Calcium and magnesium salts of detergents are water-soluble.
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How do detergents cause water pollution? Suggest remedial measures to prevent this pollution?
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