Question 1 The gaining of electrons from an atom or molecule is an example of:
reduction
a.
b.
adhesion
O c. capillarity
d.
cohesion
oxidation
e.

a. reduction

Explanation:

The reduction is an example of the gaining of electrons from an atom or molecule or the loss of oxygen atom from a molecule.

Oxidation and reduction always occur together so in oxidation electrons loss by one substance is fulfil by gaining electrons in reduction process.

For example: The copper ion form copper by gaining electrons and undergoing reduction.

Hence, the correct answer is a. Reduction.

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

the law of original horizontality explains:   why rocks appear in layers. correct answer: b the law suggests that all rock layers are originally laid down (deposited) horizontally and can later be deformed.   the principle is used by geologists to make assumptions about the relative ages of sedimentary rocks.