What phylum do amphioxous belong to?

A. Animalia
B. Cephalochordata
C. Chordata
D. Urochordata
E. Vertebrata


Answer: C. Chordata

Biology & Microbiology

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Biology & Microbiology

Your colleague is studying a newly discovered organism. She is becoming increasingly convinced that the organism is an arthropod. You find that you must respectfully disagree when you note that the organism has a set of distinctly nonarthropod characteristics. The features that cause you to exclude the organism from the arthropod grouping are

A. jointed legs, ecdysis, and an exoskeleton. B. antennae, six legs, and mandibles. C. compound eyes, book lungs, and a hemocoel. D. Malpighian tubules, ommatidia, and tagmata. E. pseudocoel, closed circulatory system, and ventral heart.

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You are at a stage in your research in which you must design an experiment to test your hypothesis

What factors must you include to insure that your experimental data is good valid data?

What will be an ideal response?

Biology & Microbiology

The ventral body cavities include

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Biology & Microbiology