What is the action of the biceps femoris?

The main action of biceps femoris is the knee flexion and hip extension.

Explanation:

Biceps femoris muscle is a thigh muscle present in the posterior part of the body. This muscle has two heads of origin.

Biceps femoris is involved in the knee flexion. The kknee flexion decreses the angle between the femur and tibia. Biceps femoris is also involved in the hip extension. The hip joints are open during hip extension.

answer; i believe that the correct answer is(d) nondisjunction during meiosis;

surface mining destroys mountain tops, landscapes, forests and wildlife habitats. on top of that, it leads to soil erosion and destruction of agricultural land. the landscape changes can also disrupt river channels and streams, which leads to flooding. which, can destroy plant life and other animals as well.

explanation: