The nephridium of molluscs is part of the:
a. reproductive system.
b. excretory system.
c. nervous system.
d. digestive system.
e. defense system.
B
Biology & Microbiology
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A woman has B blood type of the ABO system. Her mother is type O. From this, we can infer that her father:
A: could be any blood type. B: has AB blood type. C: could not have O blood type. D: could not have B blood type. E: could not have AB blood type.
Biology & Microbiology
The DTaP vaccine protects against which of the following respiratory diseases?
A) pneumonia B) pertussis C) anthrax D) the common cold E) tuberculosis
Biology & Microbiology
The actual sites of gas exchange in the mammalian lung are termed
A. alveoli. B. lamellae. C. parabronchi. D. bronchi. E. epiglotti.
Biology & Microbiology
Which diagram, A, B, C, or D, illustrates paracrine signaling?
1.A
2.B
3.C
4.D