Fill-in blank: The malleus and incus auditory ossicles arise from the [BLANK-1] pharyngeal arch. (1 Mark) 

Match the pharyngeal structure to its correct functional or anatomical description.  (4 Marks)

The three-domain system is primarily based on ____________.

Fertilization in the earthworm is accomplished by the use of the ________________.

Anatomical features that are fully developed and functional in one group of organisms but reduced and functionless in a similar group are termed ____________.

A closed circulatory system is found in _____________.

Many fireflies have flash patterns unique to their species and use them to identify other members of their species. This is an example of _____________.

The major insect body parts are ___________.

The age of the earth is estimated to be about ____________.

For natural selection to act on a population, there must be ______________.