Where does the exchange of materials between cells and the blood occur?
A. arteries.
B. veins.
C. capillaries.
D. All of these exchange materials.
C. capillaries.
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Albinism is a recessive disorder in which the skin and hair fail to produce pigment. The following question(s) ask you to evaluate the pedigree chart shown here in which "N" is the allele for normal pigmentation and "n" is the allele for albinism. The shaded circles for Deirdre and Shannon represent the only individuals expressing the disorder.
What is Geoff's genotype?
A. nn B. NN C. Nn D. Cannot be determined
There are 4 pulmonary veins that enter the left atrium
a. true b. false
The main center for homeostatic control of the internal environment is the ____.
A. pons B. medulla oblongata C. hypothalamus D. thalamus E. cerebellum
DNA synthessis
What will be an ideal response?