How would selective breeding be used to improve the racing ability of horses

Below are the three main organs that make up the plant body. what is the main function of the structure that is identified as b in the picture above? it anchors the plant.it produces food.it absorbs nutrients.it supports the plan

What substance acts to prevent sudden ph changes in bodily fluids?

Hemoglobin is a proton that carries oxygen around your body what is hemoglobin made from