The diagram below is an illustration of an ecological instrument. Study it an answer the question below;

When the instrument is in use, it is usually?

• A. placed slightly above soil level
• B. placed on a table
• C. suspended in air
• D. suspended to moving water

Variation which exhibits a wide range from one extreme to the other is

• A. phenotypic variation
• B. discontinuous variation
• C. continuous variation
• D. genotypic variation

Soil with the finest texture is?

• A. silt
• B. clay
• C. sand
• D. gravel

A company was prohibited from producing bags made from natural leopard skin. This is an attempt to conserve

• A. land
• B. water
• C. wildlife
• D. minerals

The organism with spiral chloroplasts and nucleus suspended by cytoplasmic strands is

• A. Volvox
• B. Spirogyra
• C. Paramecium
• D. Euglena

The position occupied by an organism in food chain is the

• A. energy level
• B. niche
• C. trophic level
• D. biomass

(a) Complete the table below;

(b) Explain briefly the biological basis of preserving foods using each of the following methods;

(i) salting (ii) irradiation (iii) smoking

Use the list of insects below to answer the question below;

I. Cotton stainer II. Honeybee III. Termite IV. Weevil

The insects whose activities are both beneficial and harmful to humans are;

• A. I and II
• B. II and III
• C. II and IV
• D. III and IV

The mutualism type of relationship is different from a parasitic relationship because in mutualism

• A. both organisms involved benefit
• B. none of the organisms benefits or harm each other
• C. both organisms harm each other
• D. only one of the organisms is harmed

Measurements of height and weight of students in a class show

• A. discontinuous variation
• B. continuous variation
• C. shortness is more prevalent
• D. fatness is less prevalent