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

Biology & Microbiology

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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

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All of the following can enter into anaerobic glycolysis to produce pyruvate EXCEPT __________.

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In an operon, the ________ acts as an on/off switch

A) operator B) promoter C) activator D) repressor

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Plants generally must use which of the following methods of phosphorus uptake?

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