Beryl is shaped like a six-sided prism. beryl is part of the
a. isometric crystal system
b. monoclinic crystal system
c. hexagonal crystal system
d. triclinic crystal system

Option C, hexagonal crystal system

Explanation:

1. A  hexagonal crystal family has two crystal systems with in it . They are

a)  trigonal and

b) hexagonal

2.The smallest unit within an isometric crystal system has the shape of cube which is the  most common shapes of the crystals.

3. In monoclinic crystal system, the crystal have unequal vector lengths just like an orthorhombic system

4. Triclinic crystal system consists of unequal axes that are  inclined at nonperpendicular angles relative to each other.

Hence, option C is correct

not necessarily. higher fitness requires the organism to be reproductive successful. for example, an organism at age 10 with 15 offspring is much more fit than an organism at age 15 with only 5 offspring.