Unlike a rock, a reptile can sit in the hot sunshine without its body temperature soaring quickly. This is because the water in its body
A) is a good solvent. B) is a poor solvent.
C) has a high specific heat. D) has a low specific heat.
C
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Simple multicellular organisms show which of the following characteristics?
A. All of these options are characteristics of simple multicellular organisms. B. adhesion of cells C. little differentiation of specialized cell types D. little communication between cells E. little transfer of resources between cells
Classification. The various energy levels in an atom of magnesium (24Mg) have different numbers of electrons. Use the numbers below to answer the following questions.
A. B. The number of electrons in the first energy level C. The number of electrons in the third energy level D. E. F. The number of electrons in the second energy level
In Drosophila, the hunchback gene encodes a protein (HB) that has a role in the development of the thorax. In the zygote and embryo, the expression of hunchback is stimulated by high concentrations of Bicoid protein. Which of the following is accurate about the expression of hunchback in the Drosophila embryo?
A. The HB protein is produced in the middle of the embryo; but is not produced in the anterior or posterior end. B. The HB protein is produced only in the anterior half of the embryo. C. The HB protein is produced throughout the embryo. D. The HB protein is produced only in the posterior half of the embryo. E. No HB protein is produced in the embryo.
Staphylococcal ________ are relatively heat-stable, so they maintain pathogenicity in warm food and are even stable to stomach acidity
a. amylases b. enterotoxins c. lysins d. proteases