If fossil species a is consistently recovered from geological deposits beneath layers containing fossil species b, then a is considered older than b. this dating technique is based on the principle of:

The question is incomplete. The complete question is:

Question: If fossil species A is consistently recovered from geological deposits beneath layers containing fossil species B, then A is considered older than B. This dating technique is based on the principle of:

a. Nitrogen analysis

b. Superposition

c. Fluorine-analysis

d. Paleomagnetism

e. Radioactivity

b. Superposition

Explanation:

Various layers of sedimentary rock occur naturally in the sequence of their deposition. According to the principle of superposition, the more recent layers of sedimentary rock are present on top of the older and the earlier ones. In this technique, most fossils are dated by their relative position in sedimentary rock. Therefore, when the fossil species A and B are dated according to the relative position of the layers in which they are found, the principle of superposition is applied.  

a tetrad is the foursome during meiosis made by two homologous chromosomes that have each already replicated into a pair of sister chromatids.

starchy vegetables are high in carbohydrates.

starchy vegetables contain more carbohydrates than non-starchy vegetables.

explanation:

there are two primary categories of carbohydrates, essentially differentiated on the basis of their carbohydrate content (which is in the form of starch - a complex carbohydrate):

those vegetables which contain little amounts of starch are termed as non-starchy vegetables, and some examples include: artichokes, broccoli and bean sprouts.

vegetables high in their starch content are distinguished as starchy vegetables, and some examples include: potatoes, chickpeas and corn.