Correct Answer: B) nematods

Explanation

The question is asking which of the given options does not have respiratory and circulatory systems. The options are annelids, nematods, insects, and molluscs. To answer this question correctly, we need to know which of these animals lack both respiratory and circulatory systems. Respiratory system is responsible for bringing oxygen into the body and removing carbon dioxide. Circulatory system, on the other hand, is responsible for transporting oxygen, nutrients, and waste products throughout the body. Annelids, insects, and molluscs all have respiratory and circulatory systems. Annelids have a closed circulatory system, insects have an open circulatory system, and molluscs have an open or closed circulatory system. Nematodes, however, do not have respiratory and circulatory systems. Instead, they rely on simple diffusion to exchange gases and nutrients with their environment. Therefore, the correct answer to this question is Option B: nematodes. It is important to note that even though nematodes lack these systems, they are still able to survive and carry out essential functions. This question highlights the diverse ways in which different animals have adapted to their environment.

Correct Answer: C. control

Explanation

(a) (i) Polymerization is a process whereby many small molecules (monomers) link together to form a giant molecule (polymer)

(ii) - addition polymerization -condensation polymerization.

(iii) I. starch/cellulose/ proteins/natural rubber/latex. II. polythene(polythene)/PVC/polystyrene/nylon/perplex.

(b) (i) Ethyne is prepared in the laboratory by the action of water on cc!cium dicarbide. The gas evolved is passed through a solution of copper II tetraoxosulphate (VI) to remove impurities and the ethyne is collected over water by upward delivery.

(ii) I. 3C\(_2\)H\(_{2(g)}\) \(\to\) C\(_6\)H\(_{6(g)}\)

II. C\(_2\)H\(_2\) + 2HBr \(\to\) C\(_2\)H\(_4\)Br\(_2\)/ H - C\(\equiv\)C – H + 2HBr \(\to\) CH\(_3\)CHBr\(_2\).

(iii) I. Benzene

II. 1,1 – dibromoethane

(c) I. Pollution is the presence of harmful substances in the environment in concentrations that cause injury to life and property.

(II) Poil spillage prevention - enlightenment programme - tree planting -proper sewage disposal.

(ii) - Air pollutions - water pollutgion - land/soil pollution

(iii) - Use of anti-pollutants in automobiles - promulgation of laws with effective monitoring - oil spoilage prevention - elightenment programme - tree planting

- proper sewage disposal

Explanation

(a) The Secretary of State for the Colonies was a minister resident in Britain. He was responsible for advising the British government on matters affecting its colonies. A Governor-General on the other hand was not a minister. He was appointed by the Queen of Britain on the advice of the Prime Minister. He was resident in the colony and acted as the Head of State.

(b)(i) He was authorized to appoint a Prime Minister.

(ii) He appointed ministers on the advice of the Prime Minister.

(iii) He gave his assent to bills passed by Parliament before they became laws.

(iv) He was empowered to dissolve, prorogue and summon parliament on the advice of the Prime Minister.

(v) He appointed members of the Public Service Commission and other important government officials on the advice of the Prime Minister.

(vi) He received credentials from foreign dignitaries accredited to his country.

(vii) He addressed the parliament during the first Parliamentary session. (Speech from the throne).

(viii) He performed ceremonial functions.

(ix) He could dismiss the Prime Minister and cabinet if there was a vote of no-confidence.

(x) He exercised prerogative of mercy on the advice of the Prime Minister.

(xi) He was the Commander-in-Chief of the Armed Forces.

Correct Answer: D. federal

Explanation

A federal system of government is one that divides the powers of government between the national (federal) government and state and local governments. It is usually headed by a president elected for a number of years

Correct Answer: C. resources are limited in supply

Correct Answer: D. suffered three consecutive defeats

Explanation

third consecutive defeat

Explanation

(a) Distinguish between Urbanization and Population Density: -Urbanization refers to the growth of towns, especially in terms of human population, physical size, and function while population density refers to the number of people living in an area per square kilometres.

(b) Highlight Problems Created by Urbanization in Tropical Africa:-Unemployment/underemployment -Traffic congestion Housing problems/congestion/shortage-Poor sanitation/waste management problem-Pressure on social amenities -Disruption of scenic beauty of the environment -Overcrowding -Pressure on infrastructure -Environmental pollution/degradation -Pressure on land -High cost of land -land dispute -High crime rate e.g armed robbery, kidnapping, etc. -Shortage of food-Social vices e.g prostitution, drug abuse, etc -increase in government expenditure -rural depopulation/rural-urban migration -Easy spread of diseases e.g cholera, etc. -urban centres are target during war -Social/political unrest -High cost of living/inflation -Disruption of government plan for development.

(c) In What ways can the problems Highlighted be Solved?:--Establishment of satellite towns -Development of rural areas -Provision of industries in rural areas -improvement in waste management/recycling of waste -industrialization in urban areas -Public education on pollution -Effective crime control- strict adherence to town planning laws -introduction of modern farming techniques -Employment generation/poverty alleviation -Good governance -Increase in salaries and wages -Price control measures -Introduction or modern farming techniques -improved security e.g CCTV cameras -Upgrading transportation system -provision of Social amenities -Social welfare schemes -Increase in government budgetary allocation.

Correct Answer: B. assets - liabilities

Explanation

The capital of a non-profit making organization is known as Accumulated fund. It is calculated as: Accumulated fund = Total assets - Total liabilities.

Correct Answer: B. iris