JAMB UTME - Biology - 1980

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

The conversion of excess amino acids into urea occurs in the

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

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

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

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

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

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

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

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

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

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

A green plant growing in a compost pit is feeding

Reserved food materials is

Why is the part labelled 5 thicker than 6?

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

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

During thunderstorms the energy of lightning discharge causes

The part of the cell solely responsible for respiration is the

The lime water in container B turned milky because

The lime water in container C turned milky because

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

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

One of the following statement is NOT true of spirogyra

Which of the labelled parts is the venga caval opening?

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

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

Which of the following spreads malaria in Nigeria?

The vacuole of a plant cell is

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

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

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

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

A true fruit is formed from

In Mucor or Rhizopus carbohydrate is absorb in the form of

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

Human beings require vitamins in their diet because vitamins

Water is required for seed germination to take place because it

The center which controls respiratory activities the mammalian brain is the

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

The testa

Milk can be pasteurized by

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

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

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

The joint between the atlas and axis vertebrae allows for

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?

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

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

Which of the following organs produces bile?