Question

which environmental factor regulates whether genes that determine the sex of a red - eared slider turtle are turned on or off?
a. hours of daylight
b. nutrient availability
c. temperature during development
d. oxygen concentration

Explanation:

Red - eared slider turtles are an example of a species with temperature - dependent sex determination. In such species, the temperature during a critical period of embryonic development determines the sex of the offspring. Hours of daylight, nutrient availability, and oxygen concentration do not play a role in regulating the genes that determine the sex of red - eared slider turtles in the way temperature does.

Answer:

C. Temperature during development