enzyme
What will be an ideal response?
a catalyst in a biochemical reaction that is usually a complex or conjugated protein
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Found mostly in marine environments, members of the ____ Lophotrochozoan phylum have a muscular, mucuscovered
proboscis that they can turn inside out to capture prey.
a. Rotifera b. Mollusca c. Platyhelminthes d. Annelida e. Nemertea
Which of the following is most directly responsible for water's unique properties?
a. It contains oxygen atoms. b. It contains hydrogen atoms. c. It is an ionic compound. d. It forms hydrogen bonds. e. It is nonpolar.
Low humidity in the atmosphere on a hot day ________.
A) helps in cooling because skin absorbs water from the atmosphere B) does not help in cooling because water evaporates from the skin faster C) helps in cooling because water evaporates from the skin faster D) does not help in cooling because skin absorbs water from the atmosphere
Once infected with Trypanosoma brucei, the patient's immune system cannot clear the infection and develop immunity because the parasite
A) has flagella that allow it to travel all over the body. B) matures into infectious trypomastigotes. C) reproduces by binary fission. D) changes its glycoprotein surface antigens every time it replicates. E) invades the central nervous system.