Which of the following is not true concerning the large intestine?
a. It is also called the colon.
b. It harbors beneficial bacteria.
c. It is involved with the absorption of sodium.
d. It is involved with the absorption of water.
e. It secretes digestive enzymes.
E
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What is the function of cyclic dimeric GMP in bacterial global regulation systems?
A. It converts GTP to cGTP. B. It acts as a secondary nucleotide messenger. C. It is a sensor kinase. D. It is an autoinducer.
Most members of the subphylum ______ are carnivorous and have an open circulatory system in which blood is pumped into the hemocoel by a dorsal heart.
a. Chelicerata b. Hexapoda c. Myriapoda d. Crustacea
Antibiotics can lead to septic shock if used to treat
A) viral infections. B) gram-negative bacterial infections. C) gram-positive bacterial infections. D) protozoan infections. E) helminth infestations.
The data below suggest that the proportion of sexuals in snails increases with parasite load. Is this the only possible explanation for the observed differences in the degree of sexual reproduction?
a. Yes, the data points show a clear correlation between parasite load and sexual reproduction. b. Yes, factors other than parasites are unlikely to fine-tune the degree of sexual reproduction in natural populations. c. No, lakes and streams differ in their average parasite load. d. No, habitat differences between lakes and streams may be responsible for different levels of sexual reproduction.