Triplane
Triplane
an aeroplane with two pairs of wings is called a biplane
Chromosomes normally occur as homologous pairs in a diploid cell. These refers to matching pairs of chromosomes which are found in the cell.
Forces ALWAYS come in pairs - as in "action/reaction". The atmosphere is no exception. For example, if the air pushes an airplane up, then the airplane also pushes the air down.
The term "bonding pairs" usually refers to electrons, so they would be negatively charged.
Cartesian product is the name that refers to the set of the ordered pairs. The Cartesian product of two sets A and B is AB.
rank - status
Kerning
Several possibly. Large quantities of shoes should be in your checked luggage and not carried on board. The overhead bins do not have enough room if everybody boarding had 5 pairs of shoes in their carry on luggage.
The hidden question refers to Thursday's sales. "Half as many as what?"
The word "pairs" can function as both a noun and a verb. As a noun, it refers to a set of two corresponding items. As a verb, it means to bring two things together to form a set.
Cephalic refers to the head. The appendages related to eating include the mandibles and two pairs of maxillae. There are also three pairs of maxillipeds that move food towards the mouth.