Part of Gregor Mendel's hypotheses of inheritance proposed that when two contrasting traits occur together, one them may be completely expressed, while the other may have no observable effect on the organisms appearance. He called the expressed trait dominant and the unexpressed trait recessive. In his genetic experiments, mendel studied seven contrasting traits of peas. One of the traits he studied was the trait for seed shape--wrinkled and round. In an experiment to determine which form of this trait was dominant, Mendel performed the following experiment

answer: b: experiments that showed that all cells are similar in how they metabolize and in their composition

explanation:

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.

la transducción de señal ocurre cuando una molécula de señalización de fluido extracelular activa un receptor de superficie de la célula.