The annulus of fern sporangium helps in

• A. spore dispersal
• B. conduction of mineral salt
• C. trapping of light energy
• D. water retention

The substance often used for vulcanization of rubber is?

• A. Chlorine
• B. Hydrogen peroxide
• C. Sulphur
• D. Tetraoxosulphate(vi) acid

(a) (i) Explain electromotive force

(ii) list two sources of electromotive force other than a chemical cell

(b) A chemical cell of electromotive force, E, and internal resistance, r, is connected in series with an ammeter, a plug key a plug key and an external load of resistance R. A volumeter is connected across the cell. Draw a circuit diagram to illustrate the arrangement,

(c) for the arrangement in (b) above, with the key opened and closed, the voltmeter readings are V\(_o\) and V respectively.

(i) Explain the physical meanings of V\(_o\) and V

(ii) Find an expression for the (I) current passing through the circuit (II) maximum power dissipated in the cell and external load respectively; (III) efficiency of the cell

If a sole proprietorship is purchased for cash, then?

• A. the purchaser debits his business purchase account with the consideration he pays
• B. all assets and liabilities must be bought
• C. goodwill results where value of assets
• D. the vendor debits his business purchase account with the considerstion he receives

Effective and responsible parenthood is primarily

• A. a national duty
• B. a military duty
• C. a political duty
• D. an economic duty

From the words lettered A to D, choose the word that best completes each of the following sentences:

Harry cannot do without his...........of short stories because he loves reading.

• A. file
• B. library
• C. collection
• D. dictionary

Choose the optionnearest in meaning to the underlined word(s).

Amina said she married adoting husband?

• A. a loving
• B. a fun-loving
• C. an uncaring
• D. a nagging

Real cost is

• A. Alternative commodities forgone
• B. Amount of money spent on goods and services
• C. Cost of goods and services
• D. True cost

A piano wire 50 cm long has a total mass of 10 g and its stretched with a tension of 800 N. Find the frequency of the wire when it sounds its third overtone note.

• A. 800 Hz
• B. 600 Hz
• C. 400 Hz
• D. 200 Hz

The societal norms that represents the overall attitude of the people in a society is called

• A. group values.
• B. general values.
• C. religious values.
• D. personal values.