Correct Answer: C. hydro

Explanation

(a) Natural grassland refers to any area of land on which sparsely distributed low forest trees and abundance of grasses suitable for grazing are present without being cultivated by farmers. Examples are the Savanna areas in Nigeria.

(b) Characteristics of natural grasslands are: (i) The soils are usually low in fertility. (ii) Grasses growing cannot be easily eradicated. (iii) Grasses are resistant to trampling by animals. (iv) The soils are well drained. Grasses are resistant to drought.

(c) Four grasses commonly found in natural grassland are: (i) Guinea grass (v Elephant grass (iii) Southern Gamba (iv) Giant star grass.

(d)Three legumes of natural grasslands include: (i) Centrosern pubescens (or centro), (ii) Calopogonium mucunoides (or Calopo) (iii) Mucuna utilis (or Mucuna).

Correct Answer: A. wadis

Correct Answer: D. Fossil records

Correct Answer: D. 120N

Explanation

M.A = \(\frac{E \times V.R}{100} = \frac{40 \times 6}{100} = \frac{12}{5}\)

W = M.A x effort

= \(\frac{12}{5} \times 50 = 120N\)

Explanation

a. Advertising It is a paid form of non-personal means of bringing the existence of goods and services to the knowledge of members of the public and to persuade them to buy and use the goods and services.

b. Demerits of Advertising

(i) It encourages adulteration of fast moving products.

(ii) At times it interrupts interesting programmes i.e. football matches/drama series/ topical discussion being viewed by audience.

(iii) It is instrumental to higher cost of products in the market, thereby making some products unaffordable.

(iv) Successful advertising leads to monopoly in the production and supply of some goods as it enables the bigger firms to drive away the smaller ones out of production and business.

(v) Some advertising through persuasion, mislead consumers to buy goods that they do not need

(vi) Some advertising is unethical as a result it corrupts the minds of young people.

(vii) Advertising leads to higher cost of production which may lead to liquidation

c. Ways in which producers can create awareness for their products

(i) This is done through the print media e.g. newspapers. magazines journals and catalogue which have state, national and international coverage.

(ii) The electronic media such as radio, television and cinema where products are displayed. and their uses demonstrated.

(iii) Personal selling: This involves engagement of salesmen who move from one place to another explaining the features benefits and uses of the products to members of the public.

(iv)Sales promotion: This involves giving out free gifts like T-shirts, openers, bags, caps and stickers that have the products' name or logo to attract buyers

(v) Through organized Trade Fairs and Exhibitions at well-known locations/centres to explain/educate their audience on the usage and benefits of the goods.

(vi) Use of Bill boards/ Hoardings mounted on top of buildings and other well designed structures at strategic locations with display of such products for the attention of passers-by.

(vii) Window display - This is used by sellers to display their goods in peculiar ways or unique design to attract passers-by.

(viii) Handbills/fliers/posters - Manufacturers engage the services of young school leavers who move about distributing these handbills/fliers to people.

(ix) Public address system/or ringing of belts to herald their presence before bringing the product to the knowledge of the people gathered around.

(x) Internet/Telephone - companies send unsolicited short message service (SMS) emails to prospective customers to create awareness.

Correct Answer: C. Mozambique

Correct Answer: D. Rabbit

Explanation

A primary consumer is a herbivore that consumes only producers or autotrophs. For this question, rabbits only eat plants and so they would be considered the primary consumers. Grass and other organisms that can manufacture their own food are classified as primary producers. Snakes and hawks hunt other animals (such as rabbits) for food, so they must be at least secondary consumers. Fungi break down dead organisms for nutrition and are thus classified as decomposers.

Correct Answer: C. The sphere will have a net positive charge.

Explanation

When a negatively charged rod is brought close to a metal sphere, the free electrons in the sphere are repelled from the rod and move to the other end of the sphere. This creates a region of positive charge on the side of the sphere closest to the rod, and a region of negative charge on the opposite side. The process of charge distribution stops when the net force on the free electrons inside the metal is equal to zero. If the sphere is then earthed, the free electrons will flow from the sphere to the ground, leaving the sphere with a net positive charge.

Correct Answer: B. Rotterdam