Question

a young snake eats and digests a mouse. the increase in the snakes mass equals (1 point)
the mass of the mouse plus the original mass of the snake.
only the mass of the mouse
the mass of the mouse minus the mass of waste produced by the snake.
the mass of the mouse plus the mass of waste produced by the snake.

Explanation:

According to the law of conservation of mass in biological processes, when the snake eats and digests the mouse, not all of the mouse's mass is incorporated into the snake's body. Some of it is excreted as waste. So the increase in the snake's mass is the mass of the mouse minus the mass of waste produced by the snake.

Answer:

the mass of the mouse minus the mass of waste produced by the snake.