Which of the following methods is appropriate for the cultivation of cassava?

• A. Budding
• B. Fragmentation
• C. Root cutting
• D. Stem cutting

Which is the most important pollutant of the marine environment in Nigeria?

• A. Insecticides
• B. Sewage
• C. Oil
• D. Inorganic fertilizers

The theory of natural selection was postulated by

• A. Gregor Mendel
• B. Matthias Schleiden
• C. Charles Darwin
• D. Robert Hook

The structure labelled l in the diagram below is the

• A. cerebellum
• B. cerebrum
• C. olfactory lobe
• D. medulla oblongata

Urea formation occurs in the

• A. heart
• B. liver
• C. lung
• D. kidney

(a) What is a cell?

(b) Describe the structure and state the function of each of the following:

(i) Nucleus

(ii) Mitochnodrion.

(c)(i) Make a labelled diagram 8 cm to 10 cm long of the Euglena.

(ii) List. three animal-like features and two plant-like features of Euglena.

Exo-erythrocytic phase of the life cycle of malaria parasite occurs in the

• A. liver of humans
• B. reticuloendothelial cells of humans
• C. Malphigian tubules of mosquito
• D. brain of humans

Which of the following statements about phosphorous is not correct?

• A. Helps to regulate the acid-base balance of the body
• B. Regulates the metabolism of proteins, fats and carbohydrates
• C. Required in many chemical reactions occurring in the body
• D. Phosphorous is a major constituent of bones and teeth

When large numbers of organisms share limited space and resources, the immediate result is

• A. extinction
• B. emigration
• C. competition
• D. immigration

A biological agent with antiviral property is

• A. Interferon
• B. enzyme
• C. antibiotic
• D. disinfectant