Why are nearly all AIDS patients at risk of developing Pneumocystis pneumonia?
A) Pneumocystis jiroveci is becoming a wide-spread contaminant in health care environments.
B) Pneumocystis jiroveci is commonly found in a wide variety of soils.
C) The pathogen is easily transmitted from infected persons to others.
D) Pneumocystis jiroveci is a common member of the respiratory microbiome in humans and opportunistic pathogen.
E) Pneumocystis jiroveci is zoonotic in a wide range of vertebrates and exposure is unavoidable.
D
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Some animals have no body symmetry or have
__________ symmetry like a wheel. Fill in the blank(s) with the appropriate word(s).
A notable exception to this evolutionary adaptation is the lack of any flying species within the
A. reptiles. B. amphibians. C. birds. D. insects. E. mammals.
Which of the following is an example of mutualism?
a) a clown fish lives inside a sea anemone and is protected by it, while the anemone receives nothing from the clown fish b) a jaguar kills and consumes a gazelle c) a remora fish removes algae and parasites from a shark's skin and receives protection in return d) a wasp paralyzes a caterpillar and lays its egg inside it e) a female cuckoo lays its egg in the nest of a smaller bird, which then raises the cuckoo chick
Four of the following are true about the amoebozoans. Which one is the exception?
A. They are shape shifters. B. They include the amoebas. C. They are the closest protist relatives of animals. D. They include species that are able to form pseudopods. E. They include the slime molds.