All animals, except for develop as a protostome.
a. sponges
b. mollusks
c. arthropods
d. echinoderms
e. vertebrates
f. chordates

Protostomes represent animals whose embryonic cells cleave in a spiral an the mouth opening develops before the anus. These animals do not always have a body cavity. Sponges, mollusks and arthropods are protostomes. Echnioderms, vertebrates and chordates are not protostomes, they are deuterostomes. Deuterostomes develop the anus before the mouth, cleave radial and have a true body cavity.

If these are the missing choices: a. to determine skin temperature, place the back of your hand against the patient's skin.b. determine body temperature by touching the patient's hands and feet.c. skin temperature will tell you very little about this patient's condition or well-being.d. the patient's skin temperature and color will likely be warm and red.my answer is: a. to determine skin temperature, place the back of your hand against the patient's skin. using the back of the hand to check for temperature rather than the palm is more effective because the back of the hand has more nerves that can feel and transmit the temperature than the palm.