Which of the following is NOT true concerning umbilical arteries?
a. There are two of them.
b. They carry oxygen-poor blood.
c. They take blood from the fetus to the placenta.
d. They are housed in the umbilical cord.
e. They carry blood that is rich in nutrients.
E
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Scientists have found that bluegill sunfish receive the highest energy return from large Daphnia, an intermediate return from medium Daphnia and the smallest return from small Daphnia. If you were to stock aquaria with equal proportions of small, medium, and large Daphnia, but vary the density of Daphnia from very low to very high, how do you think bluegills would react? Check all that apply.
_____ Bluegills would consume a larger proportion of small Daphnia in the very low density aquaria compared with the medium or high density aquaria. _____ Bluegills would consume equal proportions of large Daphnia in all aquaria. _____ In medium density aquaria, bluegills would select medium sized Daphnia over small or large Daphnia. _____ The tendency to select large Daphnia over small or medium Daphnia will increase as the density of Daphnia in the aquaria increases.
While chasing colorful marshmallows around your bowl of breakfast cereal with a spoon and contemplating the symptoms of ergot, you overhear a cable news report issue a rare retraction: The patients in the American Southwest previously reported to have been infected with tuberculosis have tested positive for a fungal, not bacterial, infection. Which fungus is most likely responsible?
a. Malassezia furfur (Tinea versicolor) b. Candida albicans (Thrush) c. Coccidioides immitis (Valley Fever) d. Claviceps purpurea (Ergot)
What is the structure that holds the chromatids together?
A. karyotype B. centromere C. chromatin D. chromosomes E. none of these
In the citric acid cycle, succinate is oxidized to form
A. citrate. B. malate. C. oxaloacetate. D. fumarate. E. succinate.