What are the most powerful stimuli for breathing?
A) high pH; high CO2
B) low pH; low CO2
C) low pH; high CO2
D) high ph: low CO2
Answer: C) low pH; high CO2
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Individuals who are described as heterozygous have different
A. parents who displayed two different phenotypes. B. alleles for a particular trait. C. genotypes than the predominant genotype. D. genes for one trait on several chromosomes.
The inferior vena cava carries blood __________ the ___________ of the heart.
away from; left atrium to; left atrium away from; right atrium to; right atrium
What action is initiated when lymph enters a lymph node through the afferent vessel?
A) ?Surging of lymph to the next vessel B) ?Creation of blood cells C) ?Destruction of red blood cells D) ?Response of the immune system
In an aqueous solution, cations are attracted toward
A) water. B) salt. C) buffers. D) anions. E) hydrogen ions.