Correct Answer: A. Sewage

Explanation

The correct answer is A. Sewage.

Here's why:

• Biodegradable substances are those that can be broken down naturally by microorganisms (like bacteria and fungi) into simpler, non-toxic compounds.

• A. Sewage: Primarily consists of organic matter (human waste, food scraps, detergents, etc.). These organic materials are readily broken down by bacteria and other microorganisms in wastewater treatment plants and natural environments.

• B. Plastics: Most common plastics are synthetic polymers that are extremely resistant to microbial degradation. They persist in the environment for hundreds to thousands of years. While biodegradable plastics are being developed, standard plastics are not.

• C. Metal scrape: Metals are inorganic elements. While they can corrode or rust, they do not biodegrade in the same way organic matter does. Microorganisms cannot break down elements into simpler substances.

• D. Lead compounds: Lead is a heavy metal and an inorganic element. Lead compounds are persistent in the environment and are highly toxic. They cannot be broken down by biological processes; they simply remain as lead in various forms.

Correct Answer: B. 2

Explanation

Number of images = (360 / 120) - 1 = 3 - 1 = 2 number of images formed = 2

Correct Answer: B. low rainfall

Correct Answer: D. there is existing constitution

Explanation

(a) Four reasons why countries exchange goods and services

(i) Natural resources; Natural resources of the world are unevenly distributed e.g Nigeria's petroleum is sold to Brazil in exchange for vehicles, sugar and communication equipment.

(ii) Degree of Industrial Development; Due to high technical knowledge and expertise which a country has in the production of goods and electronic equipment than other countries e.g Japan specialises in the production of electronic equipment

(iii) Some crops are more suited to certain climatic condition. Crops like cocoa, cotton, etc, grow in tropical regions while crops like wheat, barley and oats grow well in temperate regions

(iv) Geographical Situation;Some countries have situations which enable them to take part in trade between contrasting economies e.g Singapore handles much of South East Asia's trade

(b) Reasons for low volume of trade between Nigeria and the rest of Africa are

(i) African countries produce goods which are very similar, leaving little or no room for exchange

(ii) Nigerians have a high taste for imported goods from foreign countries. These goods are not produced by other African countries

(iii) Nigeria's foreign exchange earnings from African countries is very low - about 20%

(iv) Prices of goods offered by African countries are usually very low compared with foreign countries

(v) African countries demand for very low quantity of goods unlike foreign countries.

Correct Answer: D. presiding over native courts

Correct Answer: D. Public opinion

Explanation

There are three different types of delegated legislation these are orders in council, statutory instruments, and by laws.

Correct Answer: C. war against the French

Correct Answer: B) 6X and 25Y

Explanation

This question is about a consumer who has ?100 of income to spend on two goods, X and Y. The price of good X is ?10, and the price of good Y is ?2. The question asks which of the following combinations of X and Y is not affordable with ?100.

Option A is 10X and 0Y. This means the consumer spends all their ?100 on good X and none on good Y. Since the price of X is ?10, the consumer can buy 10 units of X with ?100. This combination is affordable.

Option B is 6X and 25Y. This means the consumer spends ?60 on good X and ?50 on good Y. The cost of 6 units of X is ?60 (6 x ?10), and the cost of 25 units of Y is ?50 (25 x ?2). The total cost of this combination is ?110, which is more than the ?100 income the consumer has. Therefore, this combination is not affordable, and it is the correct answer.

Option C is 4X and 20Y. This means the consumer spends ?40 on good X and ?40 on good Y. The cost of 4 units of X is ?40 (4 x ?10), and the cost of 20 units of Y is ?40 (20 x ?2). The total cost of this combination is ?80, which is less than the ?100 income the consumer has. Therefore, this combination is affordable.

Option D is 5X and 25Y. This means the consumer spends ?50 on good X and ?50 on good Y. The cost of 5 units of X is ?50 (5 x ?10), and the cost of 25 units of Y is ?50 (25 x ?2). The total cost of this combination is ?100, which is equal to the ?100 income the consumer has. Therefore, this combination is also affordable.

In summary, the correct answer is Option B because the total cost of 6X and 25Y is more than the ?100 income the consumer has. This question tests the student's understanding of the concept of affordability based on the prices of goods and the consumer's income.

Correct Answer: B. 1240