Which of the following has a knot of nerve tissue at its head end?
a.
octopus.
b.
sponges.
c.
worms.
d.
bacteria.

Which of the following are the functions of the skeletal system? blood cell production in soft marrow tissues and mineral reserves largest organ of the body for defense and support vitamin d production and pumping blood through vessels voluntary movement and contractile movement

How did the discovery of the rhesus factor affect society? o more patients died from having a transfusion with the wrong rhesus factor 0 new treatments during pregnancy could prevent harm to the developing child. o less donated blood could be used in the treatment of patients. the number of blood types was reduced by half

Hemoglobin is a proton that carries oxygen around your body what is hemoglobin made from