Biology

If a boy has blood type O and his mother has blood type A. What is the genotype of his father?

The name of the enzyme that catalyses the conversion of glucose to glucose -6- phosphate at the beginning of glycolysis is

The main reason for immunizing children is to

The correct arrangement of food classes of the same quantity in the order of magnitude of energy value in animals in descending order is

Spirogyra is regarded as a multicellular plant because

Which of the following statements is not correct about the mammalian heart?

The opening of the guard cells of the epidermis in plants is by the process of

Ascaris lumbricoides is a parasitic

A gene that is only located on X – chromosome is said to be

Which of the following associations is an example of epiphytism?

Impulses are conducted towards the nerve cell through the

Which of the individuals is likely to have HIV?

Two plants with red flowers were back crossed, which of the following results indicate that the plants are heterozygous red flowers, where red flowers are dominant?

When fertilization occurs that leads to formation of a zygote, which of the following processes takes place?

The following pairs of traits are examples of continuous and discontinuous variations respectively

Which of the following structures in a flower develops into the seed?

The pulmonary circulation involves movement of the blood to and from the

What name is given to a sudden change in a gene or chromosome?

Squirrels easily kill some trees because

Which of the following diseases is transmittable through genes?

Which of the following resources is non-renewable?

Which of the following characteristic features is not associated with monocotyledonous plants?

The main difference between a seed and a fruit is that a fruit

Soil erosion could be prevented by

The structure of the cell membrane is a

The following diagrams show the sequence of events in early cell division. Study the diagrams and answer this question.
In which of the following cells is this division likely to take place?

The major problem experienced by organisms living in small water bodies is

Which of the following statements about protoplasm of a cell is not correct? It

Which of the following traits is not inheritable? Ability to

Use this information to answer this question.

A student used the following steps in testing for a non-reducing sugar:
I. added Benedict’s solution to the sugar solution;
II. added dilute hydrochloric acid to the sugar solution and boiled it;
III. added sodium hydroxide solution to the solution in II and boiled;
IV. added Benedict’s solution to the cooled solution in III

The colour change to be observed in step IV is

A community reaches a climax when

When a spirogyra filament is placed in a concentrated salt solution for 30 minutes, the cell would become

According to Mendel’s first law of inheritance, segregation of genes occur when
tall plants are crossbred
short plants are crossbred
tall plants and short plants are crossbred
plants are crossbred

Which of the following processes removes carbon (IV) oxide from the atmosphere?

Which of the following statements about sex-linked characters is not true?

The capillarity of a soil refers to

Which of the following statements about human blood groups is not true?

A farmer who wants to keep seeds for three years before planting and wants to prevent them from sprouting uses

Blood pressure is higher in the arteries as a result of

Which of the following features could be used to determine the growth of a seedling?

Which of the following organs of the alimentary canal is not correctly matched with its function?

A person had an accident that affected the skull but not the nose and later lost the sense of smell. The accident must have affected the

A woman with blood group A gives birth to a child with blood group 0. Which of the following blood groups cannot belong to the father?

person suffering from obstruction of the bile duct is advised not to eat fats and oil because

An organism at the start of a food chain which provides the total input of energy into an ecosystem is the

Which of the following cells is a specialized cell?

Use this information to answer this question.

A student used the following steps in testing for a non-reducing sugar:
I. added Benedict’s solution to the sugar solution;
II. added dilute hydrochloric acid to the sugar solution and boiled it;
III. added sodium hydroxide solution to the solution in II and boiled;
IV. added Benedict’s solution to the cooled solution in III

Why did the student add the dilute hydrochloric acid to the sugar solution in step II? To

Oil applied to the surface of water kills the larvae of mosquitoes through

Water and salts are both lost from the human body in

Ability of the human eye to focus images accurately on the retina is called

The following organisms have structures for movement except

Use this information to answer this question.

A student used the following steps in testing for a non-reducing sugar:
I. added Benedict’s solution to the sugar solution;
II. added dilute hydrochloric acid to the sugar solution and boiled it;
III. added sodium hydroxide solution to the solution in II and boiled;
IV. added Benedict’s solution to the cooled solution in III

What is the importance of step II in the testing process? To

Which of the following organisms is not a protozoan?

Which of the following components make up an ecosystem?

A plant that commonly undergoes vegetative propagation by means of leaves is