2021 JAMB Biology Past Questions

A food substance was treated with a few drops of Sudan III solution and a red colour was obtained. The food contained

Oozing out of water from the leaves of plants in a humid environment is known as

The element that is essential for the coagulation of blood is

In yeast, anaerobic respiration differs from aerobic respiration by producing

Stomatal pores open when there is

The process of deamination is essential for the

A band of connective tissue linking two bones in a joint is known as

The appendicular skeleton is composed of the pectoral girdle,

The companion cells are part of the

In which of the following groups of vertebrate, would the largest amount of yolk be found in the egg?

The structure labelled II articulates with III to form a

Which of the bones is the radius?

The construction of dams may lead to an increase in the prevalence of

Floating microscopic heterotrophs are mostly grouped as

Vaccination is carried out in order to

A soil consisting of aluminium and iron(Il) oxide is known as

The sign + is used to indicate an association where an organism gains, while 0 is used where an organism is unaffected. An association indicated as + 0 is known as

The most recently evolved structure in animals is the

The order in which organic evolution has progressed in plants is

Coelom is absent in the class of animals termed

Which of the following features are all associated with monocots?

The part labelled II is the

The part that will develop into an organ for feeling is labelled

The set of fins that controls steering, balancing and change of direction and pitch in fish is

Peripheral arrangement of vascular tissue in dicots is a characteristic of the internal structure of the

Which of the following structural features are adapted for uses other than water conservation?

A certain savanna grasshopper changes colour from green during the rainy season to brown during the dry season and black after the dry season bushfires. The reason for these colour changes is

In a group of male Agama lizards, the one with the brightest head colour is the

Complex social behaviour and organization are found mostly in

The mutation theory of organic evolution was propounded by

Amphibians are normally found

Viviparity occurs mainly in the

The jointed structure in insects that bears organs which are sensitive to touch, smell and vibration is the

Which of the following groups is the most advanced?

Most monocots are easily recognized by their

Water fleas, woodlice and barnacles belong to the group

The mode of feeding in Amoeba and Hydra is

Which of the following organisms does not exist as a single free living cell?

The structures labelled II and III respectively are

In ferns, the structure above is equivalent to the