Despite their seemingly simple anatomy and radial symmetry, ______ are a type of deuterostome, and closely related to the chordates. (Check all that apply.)
_____ Jellyfish
_____ Sea urchins
_____ Sea stars
_____ Acoel flatworms
_____ Anemones
_____ Jellyfish
__X__ Sea urchins
__X__ Sea stars
_____ Acoel flatworms
_____ Anemones
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Blood entering the heart from the body passes through the heart chambers and lungs in the following order:
A. right atrium, right ventricle, lungs, left atrium, left ventricle. B. left atrium, left ventricle, lungs, right atrium, right ventricle. C. right atrium, left atrium, lungs, right ventricle, left ventricle. D. left atrium, right atrium, lungs, left ventricle, right ventricle. E. right ventricle, left ventricle, lungs, left atrium, right atrium.
An egg of the organism of S. mansoni is isolated from the feces of an adult man who has been traveling in Africa. An unoperculated egg with a large lateral spine is recovered. The patient is administered the standard dose of praziquantel; however, his infection does not improve. Which one of the following statements explains this discrepancy?
a. Metrifonate should have been adminis-tered. b. Bilarcil is the drug of choice for this type of infection. c. Steroids should have been initially admi-nistered. d. A larger dose may be required to be effec-tive against this organism.
El Niño is a recurring weather phenomenon that
a. increases global warming. b. stabilizes world climates. c. produces a fluctuation in global climates. d. depletes the ozone layer. e. increases oceanic productivity.
The protist that causes malaria belongs to the genus Macrocystis
___________________ Indicate whether the statement is true or false.