A strain of Neisseria gonorrhea has a mutation which has caused it to lose the ability to produce fimbriae and become less virulent as a consequence. What function has this pathogen lost?
A. the ability to adhere to cells of the body
B. the ability to move from one location in the body to another
C. the ability to produce an endotoxin
D. the ability to establish a latent infection
E. the ability to prevent phagocytes killing it
Answer: A
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Answer the following statements true (T) or false (F)
1. In an open circulatory system, there is no difference between blood and interstitial fluid. 2. Relative to closed circulatory systems, Open Circulatory Systems pump hemolymph at relatively high pressure. 3. Blood is typically delivered to respiratory structures at low pressures in closed circulatory systems. 4. Frogs have two atria, but only a single ventricle.
Select the plant behavior that arises from internal stimuli.
A. Phototropism. B. Thigmotropism. C. Cytokinins promoting cell division. D. Nondevelopmental formation of aerenchyma.
Living members of this group are often the dominant land plants in cool temperate zones, especially in
areas with poor soils. Among other products, they are important sources of lumber, paper pulp, resins, and turpentine.
a. lycophytes b. ferns c. gymnosperms d. bryophytes e. angiosperms
A mass of rapidly dividing cells that have potentially lost the ability to regulate cell division is called a(n)
A) neoplasm. B) angiogenesis. C) malignancy. D) metastasis. E) keratosis.