The nucleus is considered the central organelle of a cell because it

The procaryotic cell type is characterized by a

The natural tendency of organisms as they evolve is to

In snails, the hard calcareous shells are secreted by the

The structure labelled I is formed as a result of the fusion of

The ability of the cockroach to live in cracks and crevices is enhanced by the possession of

The caste of termites that lacks pigmentation is the

The structure that prevents food particle from escaping through the fish gills are called gill

A distinguished feature of mammals is the possession of

Which of the following structures is capable of producing more tissues in the stem of a herbaceous flowering plant?

The manufacture of carbohydrates by plants takes place only in

In a water culture experiment, a plant showed poor growth and yellowing of the leaves. These may be due to deficiency in

In million's test, when the reagent is added to a protein food item, a white precipitate is produced which turns

Regulation of blood sugar level takes place in the

Unicellular organisms transport essential nutrients directly to all parts of their bodies by the process of diffusion because, they have

The heart of the adult frog consist of

In adult mammalian blood, the cells which lack nuclei are the

Which of following movements occur during exhalation?

In which of the following groups of animals is the malpighian tubule found?

Which of the following is not a function of the mammalian skeleton?

The most reliable estimate of growth is by measuring changes in

A dry fruit formed from two or more carpels containing several seeds is a

The outermost embryonic membrane in the mammal is the

The small masses of nervous tissues in which many neurones have their nuclei are called

The corolla is partly represented by

A group of organisms of different species living in a particular area is described as a

Which of the following is the direct consequence of transferring energy from one trophic level to another?

The condition that encourages denitrification is

A fresh water plant such as water lily can solve the problem of buoyancy by the possession of

The sequence of the biomes in Nigeria from port Harcourt to Damaturu is

Soil micro-organisms are beneficial because of their involvement in

Which of the following groups of diseases are associated with water? I Onchocerciasis II Schistosomiasis III Dracunculiasis IV Elephantiasis V Taeniasis

One of the ways which body cells differ from gamete cells is in the

In blood transfusion, agglutination occurs when

The unrestricted pattern is represented by

After one week of life, the weight of five chicks of the same sex hatched simultaneously from the eggs of the same hen and fed on the same diet were 45g, 40g, 35g, 33g and 30g. This is an example of

The phenotype of an individual can be summed up as the

The correct increasing order of size for the cell components responsible for heredity is

A sex-linked character cannot be passed on directly from

The biological association that contributes directly to succession in a community is

The group of insects that have mouth parts adapted for both piercing and sucking is

The bird's bill adapted for fishing is labelled