This lineage of Echinoderms is made up of sea cucumbers, which are elongated along their oral-aboral
axis and have a well-developed circulatory system.
a. Echinoidea
b. Ophiuroidea
c. Crinoidea
d. Holothuroidea
e. Asteroidea
D
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Plants generally must use which of the following methods of phosphorus uptake?
A. nonenergy transport B. transport control by soil moisture C. passive uptake D. ATP proton cotransport E. None of these are true
What is epigenetic gene regulation?
a. regulation after translation b. regulation when RNA is processed and exported to the cytoplasm after it is transcribed c. regulation when the DNA is uncoiled and loosened at the nucleosomes to bind transcription factors d. regulation when RNA is translated to protein
All of the following can enter into anaerobic glycolysis to produce pyruvate EXCEPT __________.
In an operon, the ________ acts as an on/off switch
A) operator B) promoter C) activator D) repressor