What is the right description for the submucosa?
A) made of smooth muscle
B) contains secretory glands that release enzymes
C) part of the peritoneum
D) made of connective tissue
D) made of connective tissue
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A substance made up of two or more elements whose properties are usually different from those of either of the two original substances
A) Polarity B) Compound C) Denaturation D) Monosaccharides E) Hydrogen bonds F) Element G) Triglycerides H) Amino acids I) Tertiary structure J) Active site
Which of the following act as pain-signaling molecules?
a. substance P b. morphine c. endorphins d. histamine and prostaglandins e. dopamine
In Experimental Condition 1 of Figure 54-1, the distribution of Balanus suggests:
a. that interspecific competition kept Balanus from extending higher into the intertidal area.
b. that intraspecific competition kept Balanus from extending higher into the intertidal area.
c. that an unfavorable environmental factor kept Balanus from extending higher into the
intertidal area.
d. that Balanus is less motile than Chthamalus.
e. that Balanus is more motile than Chthamalus
The shapes of flowers may permit only certain animals to carry pollen from one flower to the next. The type of isolating mechanism displayed here is
A. morphological. B. habitat. C. geographic. D. All of these answers are correct.