The bicuspid (mitral) valve
A. is the location of the pacemaker cells of a normal heart.
B. prevents blood flow from the right ventricle to the right atrium.
C. prevents blood flow from the left ventricle to the left atrium.
D. prevents blood flow from the pulmonary artery to the right ventricle.
E. prevents blood flow from the aorta to the left ventricle.
Ans: C. prevents blood flow from the left ventricle to the left atrium.
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Which of the following is NOT a structure of
the middle ear?
a. eardrum b. anvil c. hammer d. cochlea e. all of these are structures of the middle ear
Sponges belong to the phylum
A. Echinodermata. B. Platyhelminthes. C. Porifera. D. Chordata. E. Cnidaria.
What happens to nucleosomes during DNA replication?
What will be an ideal response?