Fill in the Blank with One of the Words or Phrases

question 190

Multiple Choice

Fill in the blank with one of the words or phrases listed below. $$\begin{array} { l l l } \text { index rationalizing } & \text { conjugate } & \text { principal square rootcube root midpoint } \\\text { complex numberlike radicals } & \text { radicand } & \text { imaginary unit } \quad \text { distance }\end{array}$$
-The ----------written i, is the number whose square is -1.

• A) conjugate
• B) imaginary unit
• C) complex number
• D) radicand

---

Definitions:

Transgenic Lab Animals

Animals genetically modified to carry genes from another species, used extensively in research to study diseases, genetics, and the effects of genes.

Human Genes

The fundamental units of heredity in living organisms that are made up of DNA and determine specific characteristics by coding for proteins.

Human Diseases

Disorders or illnesses that affect humans, which can be caused by factors such as pathogens, genetics, or environmental conditions.

Southern Blot

A technique in which DNA fragments, previously separated by gel electrophoresis, are transferred to a nitrocellulose or nylon membrane and detected by autoradiography or chemical luminescence. Compare with Northern blot and Western blot.