Which of the following statements best describe an ecosystem?

• A) A place where living organisms can live successfully
• B) The interactions between living organism in a habitat and the non-living part of the environment
• C) A biological association between a plant and an animal
• D) A system of grouping organisms in a habitat

a food chain involving a primary producer, a primary consumer as well as a secondary consumer, the sharing of trophic energy is in the form that the

• A. the primary consumer has more energy than the primary poducer
• B. secondary consumer takes up all the energy contents of the primary consumer
• C. energy is shared equally between the three groups of organism
• D. secondary consumer gets only a small portion of the energy contained in the primary producer

The organ located within the duodenal loop in the mamal is the

• A. spleen
• B. pancreas
• C. liver
• D. gall bladder

The host of Taenia Solium is _________

• A. cow
• B. pig
• C. shee
• D. dog

Which of the following substances constitute domestic waste? I Fertilizer II. Insecticides III. Sewage IV. Crude oil V. Sulphur dioxide

• A. l only
• B. lll only
• C. lV only
• D. ll and V only

Tissue respiration is important for the

• A. absorption of oxygen into the alveoli
• B. release of carbon (IV) oxide into the lungs
• C. release of energy for the body use
• D. exhalation of carbon(IV) oxide from the lungs

The cell walls of bacteria, plants, and fungi are of varying composition. Plant cells are composed of __________.

• A. peptidoglycan
• B. carboxypeptidase
• C. glycogen
• D. cellulose

Which of the following is involved in secondary thickening in plants?

• A. Collenchyma and xylem cells
• B. Vascular cambium
• C. Cork cambium and sclerenchyma
• D. Vascular cambium and cork cambium

The following organisms are producers except

• A. Hibiscus
• B. Mushroom
• C. Cactus
• D. Spirogyra

Which of the following are components of glomerular filtrate?

• A. All the components of blood except mineral salts
• B. Water and salt only
• C. All the components of blood except plasma protein and cells
• D. Blood cells, amino acid, salts and nitrogenous wastes