JAMB UTME - Biology - 1980

A mosquito which produces eggs which float, and whose larvae lie horizontal to the water surface, also rests at the angle on a vertical surface. This type of mosquito is

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A fresh Kolanut weighing 1g was put into salt solution. After 3 hour, the kolanut weighed 1.2g. This simple experiment demonstration that

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The vacuole of a plant cell is

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Milk can be pasteurized by

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The testa

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Biconcave lenses are used in the correction of an eye defect called?

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The following are connected with the movement of a reflex action (1) Central nervous (2) Muscles (3) Skin (4) Sensory nerve (5) Motor nerve. Which of the following sequences indicates a correct path?

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which part of the human brain is concerned with reflexes controlling the rate of heart beat and breathing?

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Water is required for seed germination to take place because it

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During thunderstorms the energy of lightning discharge causes

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Which of the following hormones is produced during fright or when agitated?

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Reserved food materials is

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Which of the following organs produces bile?

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The tips of some rice seedlings were cut off while some were left intact. Both were covered with a container which had not only one small hole to allow light through. After twenty-four hours it was observed that

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The filament of spirogyra were put into equal volumes of sugar solutions X and Y. After 5 minutes, filaments from solution X had their cells contents rounded up while those from Y were unaffected. The experiment shows that

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The part of the cell solely responsible for respiration is the

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Leguminous plants, e.g Mucana, are usually planted in cultivated farmlands because they

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For pollination and fruit formation, the essential part(s) of the flower should be the

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Which of the following spreads malaria in Nigeria?

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Some of the features of an animal are scales, teeth, nares and backbone. The animal is likely to be a

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The joint between the atlas and axis vertebrae allows for

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Which one of the following parts of the mammalian body is most closely associated with the production of urine?

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The center which controls respiratory activities the mammalian brain is the

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In Mucor or Rhizopus carbohydrate is absorb in the form of

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A true fruit is formed from

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Human beings require vitamins in their diet because vitamins

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Which of the following food substances is digested in the stomach?

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During excretion of urea there is also a corresponding re-absorption of water into the blood. This re-absorption takes place in the

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The lime water in container B turned milky because

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The organ through which food and oxygen are supplied to the human embryo and which also prevents harmful materials from reaching the embryo is the

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One of the following statement is NOT true of spirogyra

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An organism X lives entirely on the waste products in another organism Y. In this association X is a

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Why is the part labelled 5 thicker than 6?

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A few grams of dried soil were first heated until red hot and then further heated until no more smoke was released. This experiment was to determine

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If a baby is a female, her mother's ovum must have been fertilized by a sperm carry the chromosome

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A potometer is used to determine the rate at which a shoot

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In animals, cilia, flagella, pseudopodia and chaetae, can be used for

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Oxygen from the atmosphere reaches the mammalian blood stream through one of the path indicated below. Indicate the correct path, a = mouth, b = trachea, c = bronchiole, d = nostril, e = bronchus, f = alveoli

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The amount of water loss from a leaf can be detected using

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Which of the labelled parts is the venga caval opening?

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In anaerobic respiration, glucose is converted to one of the following

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A student trying to find out the order in which organisms appear on a cleared plot is studying one of the following

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Below are some group of diseases. Which group of diseases is caused by bacteria?

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A green plant growing in a compost pit is feeding

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If the bark and phloem tissue of a woody shoot are peeled off by ringing, the whole plant will die eventually die because?

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Which one of the following animals is NEVER a secondary host of tapeworms?

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The conversion of excess amino acids into urea occurs in the

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if three 30 cm lengths of glass tubes are tightly packed with clay, sand and loamy soils respectively and then stood in a beaker of water for one week, the level of water will be

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In the figure above the structure which prevents friction between the bones is

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The lime water in container C turned milky because

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