Which worm phylum lacks body segmentation?

A. Flatworms
B. Roundworms
C. Annelids
D. Both flatworms and roundworms


Answer: D

Biology & Microbiology

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Under what condition does hemoglobin tend

NOT to release oxygen?

a. low oxygen concentrations b. warm temperatures c. low pH d. low carbon dioxide concentrations e. all of these are conditions under which hemoglobin tends to release oxygen

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Species interactions between members of a

community include __________, which harms both species. Fill in the blank(s) with the appropriate word(s).

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If the tallest and shortest individuals of a population of humans do not survive and reproduce as well as the individuals of "average" height, which type of selection would most likely result?

A) Directional selection B) Artificial selection C) Stabilizing selection D) Disruptive selection

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All gram-negative bacteria are classified as proteobacteria

Indicate whether the statement is true or false

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