Explain how are new discoveries more likely in anatomy or physiology

Which of the following is a macronutrient? carbohydrates lipids amino acids all of the above

What evidence supports the law of conservation of energy? a) mechanical energy is converted to chemical energy during photosynthesis. b) oxygen is made from the breakdown of carbon dioxide during photosynthesis. c)energy is absorbed by chlorophyll and becomes chemical energy during photosynthesis. d)the sun gives off light energy that is absorbed by plants.

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?