Which statement describes an open circulatory system?

a. It allows blood to be contained in blood vessels.
b. It contains two circulatory systems.
c. It is more efficient than a closed system.
d. It allows hemolymph and interstitial fluids to be mixed together.


Ans: d. It allows hemolymph and interstitial fluids to be mixed together.

Biology & Microbiology

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The scientific name of humans is Homo sapiens. What is the genus of humans?

A. Homo B. sapiens C. Homo sapiens D. AnimaliaE. Eukarya

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Addition of ATP to isolated axonemes causes localized bending. What can be done to the isolated axonemes to cause the outer doublets to slide past each other unrestrained, lengthening the overall structure instead of causing bending?

A) add gelsolin B) remove the interdoublet nexin links C) add nocodazole D) remove the ATP E) inhibit tektin activity with a drug

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Prophages can be activated into viral replication and enter the lytic cycle.

Answer the following statement true (T) or false (F)

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Which of the following are phagocytic cells descended from monocytes?

A. alveolar macrophages B. dendritic cells C. microglial cells D. alveolar macrophages and dendritic cells E. alveolar macrophages and microglial cells

Biology & Microbiology