An arthropod's exoskeleton performs all of the following functions except
a. production of gametes.
b. protection of internal organs.
c. support of the animal's body.
d. preventing loss of body water.

A. Production of gametes.

Explanation:

Arthropod exoskeleton is formed by chitin. Chitin is a carbohydrate that is part of the cell walls of fungi and the exoskeleton of arthropods. Exoskeleton gives protection to the internal organs due to its hardness. It also acts as a support of the body, it can be said that it is the analogous to the skeleton in humans and also prevents water from evaporating. Gametes are produced in the reproductive organs of arthropods.

it has one origin of replication, but it proceeds in two directions - d)

multiplying and dividing the two decimals and the eqations by the same number of the overalls