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 consists of several groups of muscles ((internal and external intercostals and subcostal and transverse thoracic muscles) which are located between the ribs and function to move and stabilise the chest wall. Grade I Strain: This is a mild strain and only some muscle fibers have been damaged. 2  Healing occurs within two to three weeks. 3  Grade II Strain: This is a moderate strain with more extensive damage to muscle fibers, but the muscle is not completely ruptured.