First he pollinated  short pea plants with tall pea plants. T â¦ he next generation of pea  plants resulting from the expiriment were all tall pea plants. He  bred two of the pea plants from thhe new generation and they ended  up having 3 tall pea plants and 1 short pea plant.
Intercostal muscles are several groups of muscles that run between the ribs, and help form and move the chest wall. The intercostal muscles are mainly involved in the mechanical aspect of breathing.These muscles help expand and shrink the size of the chest cavity to facilitate breathing. External intercostal muscles aid in quiet and forced inhalation. 2  They originate on ribs 1-11 and have their insertion on ribs 2-12. 3  The external intercostals are responsible for the elevation of the ribs and bending them more open, thus expanding the transverse dimensions of the thoracic cavity.
The intercostal muscles are located between the ribs. There are eleven intercostal muscles that are located on each side of the rib cage. They function to move and stabilize the chest wall. Intercostal muscles connect one rib to another and aid in breathing by expanding and contracting the ribs effectively.ntercostal muscles play a vital role in the movement of the ribs. When the muscles contract, the ribs move up, and when the muscles relax, they moves down. When breathing, these muscles force air in and out of the chest.