Which is incorrect about histoplasmosis?
A. Respiratory infections range from mild to severe.
B. Histoplasmosis never spreads to sites outside the respiratory tract.
C. It is transmitted by inhalation of spores.
D. The pathogen grows inside macrophages.
E. Chronic cases have symptoms similar to tuberculosis.
Answer: B
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One of the symptoms of global warming is a decrease in the persistence of sea ice in the Arctic, which affects polar bears by:
a. increasing their access to salmon b. reducing the portion of the year that they can reach seals c. improving the chances of survival of their young d. increasing mercury contamination in their tissues and increasing their access to salmon e. increasing risk of stranding far from shore and reducing the portion of the year that they can reach seals
What is the function of white blood cell
granules?
a. to phagocytize pathogens and cellular debris b. to release cytokines, digestive enzymes, and toxins that kill parasites c. to activate killer Tcells d. to morph into dendritic cells that phagocytize pathogens e. to act as memory cells for B lymphocytes
Lard is a solid fat at room temperature. What does this tell you about the triglycerides in lard?
A) Lard is composed of saturated fats. B) The fats in lard are mostly phospholipids. C) The fats in lard are not organic molecules. D) Lard is composed of unsaturated fats.
If a beaver eats the bark all the way around a tree trunk (a process called "girdling"), why does the tree die?
A) Water and minerals are no longer supplied to the leaves. B) Cells of the lateral meristem can no longer divide. C) The tree cannot continue to photosynthesize. D) The tree is susceptible to insect and fungal diseases. E) The phloem is damaged, and the transport of sugars ceases.