The methanogenic archaeans are __________ that

pull electrons from __________.
a. chemoautotrophs; oxygen
b. chemoheterotrophs; carbon dioxide
c. chemoautotrophs; water
d. chemoheterotrophs; methane
e. chemoautotrophs; hydrogen gas


Answer: e

Biology & Microbiology

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Which of the following describes the sex-linked trait of white eye color in male fruit flies?

a. Wild type b. Homozygous c. Heterozygous d. Hemizygous

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A molecule of a saturated triacylglycerol contains:a

the maximum number of double bonds between carbons in the fatty acid chains. b. the maximum number of triple bonds between carbons in the fatty acid chains. c. the maximum number of hydrogen atoms in the fatty acid chains. d. fatty acid chains with both amino and carboxyl groups. e. alternating single and double bonds between carbons in the fatty acid chains

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What is a conjugated system?

a. a pigment region where hydrogen atoms are covalently bonded to each other with alternating single and double bonds b. a pigment region where oxygen atoms are covalently bonded to each other with alternating single and double bonds c. a pigment region where carbon atoms are covalently bonded to each other with alternating single and double bonds d. a pigment region where nitrogen atoms are covalently bonded to each other with alternating single and double bonds

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The steroid hormone that coordinates molting in arthropods is _____

A) ecdysteroid B) glucagon C) thyroxine D) growth hormone

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