Correct Answer: A. Partners current account and credited to the profit and loss appropriation account

Correct Answer: A. he could successfully promote his own will

Correct Answer: A) ionic bonding

Explanation

Bond dissociation energy refers to the amount of energy required to break a bond between two atoms. The higher the bond dissociation energy, the stronger the bond.

The options given are ionic bonding, covalent bonding, hydrogen bonding, metallic bonding, and van-der-waals bonding.

The correct answer is Option A, which is ionic bonding. Ionic bonding involves the transfer of electrons from one atom to another, resulting in positively-charged cations and negatively-charged anions that are held together by electrostatic attractions. These attractions are very strong, hence the high bond dissociation energy of 500 KJ mol-1 can be assigned to ionic bonding.

Covalent bonding involves the sharing of electrons between atoms, while hydrogen bonding involves a special type of dipole-dipole interaction between molecules containing hydrogen and electronegative elements. Metallic bonding involves the sharing of electrons between metal atoms, while van-der-waals bonding involves weak intermolecular forces between nonpolar molecules.

To learn more about chemical bonding and bond dissociation energy, please see the relevant sections of the recommended textbooks

Correct Answer: D. is usually controlled by one or two pair(s) of genes

Correct Answer: D. Caliph Umar b. Abdul Aziz

Correct Answer: B. They opposed the Israelites on the way

Correct Answer: D. Cambium

Explanation

(a) Four components of the ecosystem are:

(i) Lithosphere (solid-earth crust)

(ii) Hydrosphere (liquid component)

(iii)Atmosphere (gaseous component)

(iv) Biosphere (Living organisms component).

(b) Carbon cycles have helped to explain the inter-dependence of the components in the ecosystem in the following ways.

(i) There is the inter-relationship between plants and the atmosphere as it is from the atmosphere that plan. derive the carbon dioxide that they need for photosynthesis. Then man and other animals give out carbon dioxide through the process of respiration.

(ii) There is an inter-dependence within the biotic components themselves. The herbivores together with the carnivores and decomposers, pass on the energy and matter

(iii) Man also contribute to the carbon in the atmosphere through the burning of fossil fuel, e.g coal, petroleum, liquid gas and burning of wood

Correct Answer: D. deer

Explanation

(a) Problems of rail transport in Nigeria are:

(I) The train may be slower on short routes.

(ii) The cost of running rail transport is enormous.

(iii) Rail transport is characterised by delays and so may be unsuitable where goods are needed to be delivered very fast.

(iv) Trains cannot deliver directly to the customer. It usually has to rely on road transport to deliver goods to the final destination goods to the final destinations.

(v) Trains cannot move into warehouses or factory premises to collect goods.

(b)(i) Tramp liners; have no defined route and do not run on schedule. They are used as cargo taxi cabs in water transport and are smaller in size than ocean liners. They can be used in carrying goods anywhere they are found.

(ii) Ocean liners; include passenger and cargo liners. Cargo liners are ships used in carrying goods along high seas and oceans. Cargo liners operate on schedule and they have specific routes. Passenger liners are ships used in carrying passengers on high seas and oceans. They operate on schedule and have specific routes also.