Please select a subject first
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The structure formed by the villi of the embryo and the uterus of the mother.
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A single highly coiled tube where sperms are stored gets concentrated, and mature is known as ______
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fill in the blanks with suitable functions: Seminiferous Tubule and _____
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Match the Column:
| no | Column A | Column B |
| 1 | Allele | Control of automobile exhaust |
| 2 | Leydig cells | Tourniquet |
| 3 | Utriculus | Alternate forms of genes |
| 4 | Snake bite | Dynamic equilibrium |
| 5 | Euro IV norms | Testosterone |
| Sudden change in genes | ||
| Static equilibrium |
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State the main function of the Sperm duct.
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The site of maturation of human sperms is the
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Explain Biomedical waste
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Give technical terms for Thin walled sac of skin which covers the testes
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Choose the ODD one out from the following terms given and name the CATEGORY to which the others belong :
Prostate gland, Cowper’s gland, seminal vesicle, seminiferous tubules
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Given below are diagrams showing the different stages in the process of fertilisation of an egg. in the human female reproductive tract.
Study the diagrams and answer the questions:
1) Arrange the letters given below each diagram in a logical sequence to show the correct order in the process of fertilisation.
2) Where does fertilisation normally take place? and What is ‘Implantation’ that follows fertilisation?
3) Mention the chromosome number of the egg and zygote in humans.
4) Explain the term ‘Gestation’. How long does Gestation last in humans?
5) Draw a neat, labelled diagram of a mature human sperm.
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Give biological explanations for The placenta is an important structure for the development of a foetus
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Give biological explanations for All the food chains begin with green plants.
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Name the following:
The process by which molecules distribute themselves evenly within the space they occupy.
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Choose the odd one out from each series
The conditions – cretinism, myxoedema, goiter, scurvy
………………………………………….
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Identify the odd one in the following and mention what the rest is:
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match the conditions in column A with the cause in column B.
| A (Condition) | B (Cause) | ||
| a | Dwarfism and mental retardation | 1 | shortage of glucose in blood |
| b | Diabetes mellitus | 2 | Over secretion of growth hormone |
| c | Excess of glucose in blood | 3 | Insulin shock |
| d | Gigantism | 4 | Over secretion of thyroxine |
| e | Enlargement of breasts in adult males | 5 | Hypothyroidism |
| f | Exophthalmic goitre | 6 | Over secretion of cortical hormones |
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Mention which of the statements are true (T) and which are false (F). Give reason in support of your answer.
Simple goiter can be prevented by using iodised salt in food.
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Why is iodine as a nutrient, important to our body?
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People living in the low Himalayan hilly regions often suffer from goiter. What could be the possible reason for it?
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Given below is a table designed to give the names of the glands, the hormones produced, their chief functions, the effects of oversecretion and undersecretion in respect of thyroid, pituitary and pancreas. Fill up the blanks 1–13.
| S.No. | Source Gland cells | Hormone produced | Chief function | Effect of oversecretion | Effect of undersecretion |
| 1 | (1) ______ | Thyroxine | (2) ______ | (3) ______ | (4) ______ |
| 2 | Beta cells of Islets of Langerhans | (5) ______ | Promotes glucose utilisation by the body cells | (6) ______ | (7) ______ |
| 3 | (8) ______ | Growth hormone | (9) ______ | (10) ______ | Dwarfism |
| 4 | (11) ______ | Vasopressin | Increases reabsorption of water from kidney tubule | (12) ______ | (13) ______ |
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