Answer:
Due to environmental conditions.
Explanation:
With the passage of time, environmental conditions change which causes the evolution of of four legged land animals from fish like creature. This change occurs due to change in environment. In water, there is no need for legs because fish moves with the help of fins and tail but the organisms that lives on land has legs in order to move from one place to another so we can say that change in the physical structure of organism occurs due to environment.
Answer:
Your question is incomplete.
Explanation:
Although this is a correct statement, since in the species of land turtles the temperature is a determinant of sex.
If the egg is exposed to temperatures below 40-38 degrees Celsius, the sex will tend to be male or male, and if a temperature of 40 degrees Celsius occurs constantly throughout the incubation, it will be female.
