In an undisturbed sequence of sedimentary rocks, younger layers overlie older layers, according to the principle of

Sedimentary rocks overlie a basement of older intrusive igneous or metamorphic rocks in a(n)

These are all synovial joints:  plane,  saddle, ball and socket ,suture in skull    

Astronomers use a(n) __________ to analyze a star’s electromagnetic radiation and to distinguish various star types.

The importance of computers and of computer software to modern systematics s is most closely linked to advances in ________.

If the order in a sequence of rock layers is known, their __________ can be inferred.

Give three  purposes for the skeletal system 

A possible phylogenetic tree for the three domains of life.   Which of these processes can be included among those responsible for the horizontal components of the figure?

Although a total lunar eclipse can be seen from most locations on the Earth, a total solar eclipse cannot because the __________ has a large shadow relative to the __________.

Which of the following processes is NOT involved in metamorphism?