The living members of the ____ lineage, the hagfishes, are jawless vertebrates with axial skeletons composed of only a cranium and a notochord.
a. Petromyzontoidea
b. Placodermi
c. Cephalochordata
d. Urochordata
e. Myxinoidea
ANSWER: e
You might also like to view...
Each adenine-thymine base pair has ________ hydrogen bonds, while each guanine-cytosine base pair has ________ hydrogen bonds
A) two / one B) two / three C) four / three D) three / two
The digestion of proteins in humans begins in the
a. large intestine. b. mouth. c. pancreas. d. small intestines. e. stomach.
Which of the following is TRUE of a typical skeletal muscle?
A) It is found in the walls of organs such as the digestive tract. B) Its fibers do not have a striped appearance under the microscope. C) It can be enlarged by exercise. D) It is only found in heart tissue.
Emery was in a serious accident and had to have a large part of his stomach surgically removed. He needed a transfusion at first, but soon he healed. However, after his recovery, he started having anemia. Why did he develop anemia, and how can this form
of anemia be treated? What will be an ideal response?