The protrusible rasping organ in a mollusk's mouth that is used to scrape food from the substrate is
A. a veliger.
B. a visceral mass.
C. composed of nacre.
D. a radula.
E. an ammonite.
D. a radula.
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A mixture of DNA fragments is amplified from a sample of ocean water. Which gene(s) could be definitively categorized as originating from a species of animal?
A. Genes for ATP synthase B. Genes for RuBisCO C. Gene for Spongin D. Cell cycle regulatory genes E. Genes for biosynthesis of chitin Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you already know about animal genes? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process ·Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
The atmospheric pressure on top of Mt. Everest is only about 238 mmHg, so the approximate partial pressure of oxygen there is
A. 2.4 mmHg. B. 50 mmHg. C. 186 mmHg. D. 238 mmHg. E. 476 mmHg.
Which type of physical mapping would be best to use when variable recombination frequency is a concern?
a. restriction fragment length polymorphism b. cytogenetic mapping c. radiation hybrid mapping d. microsatellite polymorphism
Clusters of budding yeast and branching pseudohyphae are consistent with (candidiasis/dermatophytosis/histoplasmosis)
What will be an ideal response?