Question

What is an example of the effect of environmental factors on cell differentiation?
A
The sex of turtles is determined by temperatures in the nest during incubation.
B
The kidneys release more urine in response to an increase in blood pressure.
C
The menstrual cycle is controlled by the hormones estrogen and progesterone.
D
The plant hormones known as auxins stimulate cell elongation in roots and stems.

Answer 1

A

Explanation: Temperature in the nest is an environmental cue that directs sex determination (gonadal cell differentiation) in some turtles.
B is a homeostatic physiological response, C and D involve internal hormonal regulation rather than an external environmental factor directly causing cell differentiation.