Experiencia N° 3: POROSIDAD a) En un recipiente con agua introduce una tiza y una esponja.
b) ¿Qué ha sucedido con la tiza y la esponja? Anota tus observaciones.


c) ¿Qué diferencia encuentras al introducir la y al introducir de la esponja?


d) Dibuja la experiencia.
e) ¿A qué conclusión podemos llegar?

The pharynx is the structure in the body that serves as a pathway of both air and food. how does the body make sure that food does not get into the lungs? the salivary glands secrete enzymes that pull food out of the air pathway. the small intestine pushes the air out of the digestive system. the pancreas breaks down food in the air pathway. the epiglottis closes the air pathway so that food will not enter it.

10. in which phase will crossing-over occur? a. mitosis b. metaphase ii c. prophase i d. meiosis ii

Substances that can pass through cell membranes by diffusion include a. na ions. b. proteins c. glucose. d. oxygen.