Scorpions have a prosoma, pedipalps that are modified into claws, and chelicerae. Which taxonomic group are they a member of?

A. Myriapoda
B. Crustacea
C. Hexapoda
D. Chelicerata


Answer: D

Biology & Microbiology

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In a particular layer of rock, a number fossilized ferns are found, but no fossilized mosses are found. What conclusions can be drawn from this finding?

A. The soft tissues of mosses may not have fossilized as readily as the lignified tissues of ferns, so it is difficult to draw any conclusions from this limited sample. B. Mosses and ferns did not coexist in the same environment. C. There are fewer species of moss than ferns. D. Ferns evolved earlier than mosses, so it is not surprising to find a layer with only ferns and no mosses. E. Ferns decompose more rapidly than mosses and thus are more likely to fossilize.

Biology & Microbiology

A saprobe with a cell wall will utilize extracellular digestion.

Answer the following statement true (T) or false (F)

Biology & Microbiology

Which of the following were used in studies to test and support the hypothesis that high pressure forces phloem sap to flow?

a. radiolabelled sugars b. radiolabelled hormones c. aphids d. vacuum chambers

Biology & Microbiology

A normal Arabidopsis flower is composed of four concentric whorls.  Which of the following is the correct order of whorls, starting from the outside and moving in?

A. carpels-petals-sepals-stamens B. sepals-petals-stamens-carpels C. petals-sepals-carpels-stamens D. stamens-carpels-sepals-petals E. carpels-stamens-petals-sepals

Biology & Microbiology