Which type of chromosomal mutation results in the reversal of a part of a
chromosome?
A, inversion
B. deletion
C. duplication

Ecologist have observed a sharp increase of sulfur dioxide in the air . what might be a possible consequence of excessive sulfur dioxide in the air ? a. acid rain b. ozone layer depletion c. ozone layer hole d. increase in sea levels

The cluster of developing cells from conception until birth is called an

Which is not a type of symmetry? a. asymmetryb. radial symmetryc. bilateral symmetryd. lateral symmetry