Which of the following is true regarding hemoglobin?
a. It is a lipid.
b. It contains iron.
c. It raises the concentration of oxygen in the blood.
d. It is present in all vertebrates and invertebrates.
e. It is identical to hemocyanin.
ANSWER: b
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Body size can be significantly altered in individuals with hormonal disorders; too much growth hormone (GH) prior to puberty causes ________
a. poor growth, and is termed pituitary dwarfism b. long, spindly limbs, a condition called Marfan's syndrome c. acromegaly, excessive growth of the hands and feet d. gigantism, a normally proportioned but very large body
Since hormones are present in such small amounts, how can their signals be amplified enough to
regulate so many physiological processes? What will be an ideal response?
Several epidemic microbial diseases of earlier centuries incurred high death rates because they resulted in severe dehydration due to vomiting and diarrhea. Today they are usually not fatal because we have developed which of the following?
A) antiviral medications that are efficient and work well with most viruses B) intravenous feeding techniques C) medications to slow blood loss D) hydrating drinks with high concentrations of salts and glucose
Discuss the significance of the term "deeply branching bacteria".
What will be an ideal response?