Cnidarians are
A. aquatic animals.
B. Both land-dwelling animals and aquatic animals are correct.
C. land-dwelling animals.
D. arboreal animals.
E. Both land-dwelling animals and arboreal animals are correct.
D. arboreal animals.
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The equation, 6CO2 + 6H2O ? C6H12O6 + 6O2, describes which of the following processes?
A. photosynthesis B. light reaction C. Calvin cycle D. nitrogen fixation E. aerobic respiration
Sponges (phylum: Porifera) are animals that possess feeding cells called collar cells. These cells have a central flagellum surrounded by a collar of microvilli. The collar filters organic matter out of the water column. Which protist shares a more recent common ancestor with the poriferans?
A. Ciliates B. Rhodophyta C. Choanoflagellates D. Radiolarians E. Myxomycota 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 Porifera? How does it relate to the question? 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?
Harry Noller's experiments in which he extracted the ribosomal proteins and found that RNA molecules could catalyze
protein synthesis had one major flaw. What was the flaw?
a. the extraction process may have altered the RNA molecules b. protein synthesis may have occurred prior to extraction c. coenzymes, which were not extracted, might have been responsible for the reaction d. the extraction process may have altered the pH of the environment e. undetectable amounts of protein may have remained
The genetic code is sometimes called “universal,” meaning that all organisms share the same:a
genes. b. coding mechanism. c. ribosomal structure. d. mitochondrial DNA. e. nucleic acid composition.