Echinoderms are characterized by bilateral symmetry in adults, a water vascular system, tube feet, and spiny skin. Indicate whether the statement is true or false
False - radial
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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.
Moist heat requires higher temperatures and shorter times for sterilization than dry heat.
a. true b. false
The nuclear regions that contain RNA polymerase and transcription regulatory molecules that help compartmentalize eukaryotic regulation are called ________
A) nucleosomes B) histones C) interchromatin compartments D) transcription factories E) chromosome territories
What important metabolic intermediate does not cross the inner membrane of the mitochondria?
A. oxygen B. ATP C. pyruvate D. acetyl-CoA