El agua baña las células de la capa interna, llamadas que atrapan el oxígeno y los nutrientes alguien me ayuda

What have we learned from fossil evidence about evolution? a) it is an abrupt change. b)the process is observable. c) it takes place during one lifetime only. d)the most complex traits are always selected.

Blood has traveled from the heart to the toes. which describes the next step of the circulation process?

Which represents the cross between parent plants if one is heterozygous for yellow-colored pods and the other is homozygous for green-colored pods? yy  ´    ´    ´    ´  yy