Questions

The chemical composition of a rock is mainly minerals.

The address bus is unidirectional because the address information is always given by the micro processoe  to address a memory location of an input / output devices.

American Revolution started in 1775 and lasted till 1781.

The Project Procurement Management processes include the following:

Plan Purchases and Acquisitions - determining what to purchase or acquire and determining when and how.

Plan Contracting - documenting products, services, and results requirements and identifying potential sellers.

Request Seller Responses - obtaining information, quotations, bids, offers, or proposals, as appropriate.

Select Sellers - reviewing offers, choosing among potential sellers, and negotiating a written contract with each seller.

Contract Administration - managing the contract and relationship between the buyer and seller , reviewing and documenting how a seller is performing or has performed to establish required corrective actions and provide a basis for future relationships with the seller, managing contract-related changes and, when appropriate , managing the contractual relationship with the outside  buyer of the project.

Contract Closure - completing and settling each contract, including the resolution of any open items, and closing each contract applicable to the project or a project phase 

True, Animals in the Taiga and Alpine Biomes hibernate during winter.

The animals in taiga and alpine biomes have several different kind of adaptations for survival. Some animals that hibernate during the winter take the help of camouflage to protect itself from enemies. During this period of hibernation, they slow their rate of metabolism and also use less amount of energy to survive the harsh weather.