Figure 54.3 -What Is the Leading Hypothesis as to Why Terrestrial Productivity

question 2

Multiple Choice

Figure 54.3
-What is the leading hypothesis as to why terrestrial productivity is higher in equatorial climates?

• A)Productivity increases with temperature.
• B)Productivity increases with water availability.
• C)Productivity increases with available sunlight.
• D)The hypothesis is most likely a combination of the other answers.

---

Definitions:

Oncogenes

Genes that have the potential to cause cancer, usually through mutations or increased expression leading to the uncontrolled growth of cells.

Totipotent Stem Cell

Cells that have the potential to differentiate into any type of cell in an organism, including embryonic and extraembryonic tissues.

Pluripotent Stem Cell

A stem cell that has the potential to differentiate into any of the three germ layers: endoderm, mesoderm, or ectoderm, thus capable of giving rise to any cell type of the body.

Somatic Cell Lines

Cultures derived from non-reproductive body cells used in research and medical treatments.