Dr. Singh just returned from a year working in rural Africa for the World Health Organization, and now he has a small clinic in San Francisco. In both locations, he sometimes sees patients with chronic elevated IgE levels. Match the doctor's initial diagnosis for a patient in each location.
1. San Francisco
2. Africa
___ allergies
___ helminth infection
1 allergies
2 helminth infection
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Two main symbionts of termites are ________ and ________
A) archaea / bacteria B) bacteria / fungi C) bacteria / protists D) fungi / protists
In humans, nitric oxide is an important gaseous neurotransmitter. Nitric oxide is synthesized by three isoforms of nitric oxide synthase (NOS). What would be a likely effect if a male were missing the gene that codes for one of the NOS isoforms?
A. He would be unable to produce all the liquid components of semen. B. He would have high levels of mutation within his mature sperm. C. He would have difficulty getting and/or sustaining an erection. D. He would have a low sperm count due to decreased spermatogenesis.
What are the most abundant organisms in the world?
What will be an ideal response?
Arbuscular mycorrhizae are characterized by all of the following features except
A. The fungus can associate with several species of plants. B. They are seen in the earliest vascular plant fossils. C. The fungal component is a glomeromycete. D. Fungal hyphae penetrate plant root cells. E. They are the most common mycorrhizal type.