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.
Intercostal Strain. In the spine there is an intercostal muscle group consisting of the internal and external intercostals, and the subcostal and transverse thoracic muscles, located between the ribs in the thoracic cavity.These muscles can become strained due to rapid movements that bend or twist the upper body suddenly.n the spine there is an intercostal muscle group consisting of the internal and external intercostals, and the subcostal and transverse thoracic muscles, located between the ribs in the thoracic cavity. These muscles can become strained due to rapid movements that bend or twist the upper body suddenly.