Triplane
They have 5 pairs of "legs" (-> 10 legs) [paraeopodes], but only use 6 of them for walking. 2 pairs have little pincers. They also have 5 pairs (-> 10 legs) of swimminglegs [pleopodes]. This gives them 20 legs or 10 pairs out of which they use 6 or 3 pairs for walking.
68 pairs .
four base pairs
13 pairs including the floating ribs that do not connect to the sternum.
Well It has two pairs of wings which means there are four of them so to be honest with you i'd say two pairs but four wings
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.
The term "bonding pairs" usually refers to electrons, so they would be negatively charged.
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.
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
The hidden question refers to Thursday's sales. "Half as many as what?"
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.
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.
"Pair" means two items; often it refers to two items that somehow belong together.