Intermediate magma is also known as andesitic magmas and these are created when an oceanic plate subducts beneath a continental plate. The magma is generated in the wedge of mantle rock beneath the crust. The Cascade Mountain Range is formed due to the subduction of the Juan de Fuca Plate beneath the North American Plate.
(C) they used trans-Saharan trade route to acquire expensive ivory.
Answer:
Pyramid is a good representation of energy flow in an ecosystem because the shape of pyramid is wider at the bottom and pointed at the top. In the ecosystem, population of plants are maximum so it is placed at the bottom of the pyramid while the organisms such as tertiary consumers are placed at the top of the pyramid due to low in population. So pyramid is a good representation.
Answer: There are a total of 22 bones in the skull. The skull is not only made up of bones but also cartilages and ligaments. The facial skeleton does not include the teeth and the cartilage of the nose. The skull contains foramina or canals scattered throughout the skull bones.
B double helix and linked with hydrogen bonds
