The hypothesis that organic molecules formed near deep sea hydrothermal vents is called the:a
iron-sulfur world hypothesis.
b. iron-clay hypothesis.
c. organic sea hypothesis.
d. prebiotic soup hypothesis.
e. sulfur vent hypothesis
A
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How many possibilities are there for a short nucleic acid sequence of six nucleotides?
A. 24 B. 64 C. 1,296 D. 4,096 E. 64,000,000
What is the primary factor limiting scientists' ability to sequence each individual's entire genome?
A. doctor referrals B. financial resources C. patient consent D. computing power E. laboratory space
Genotypic and allele frequencies for a gene that determines neck length in giraffes are measured and found to be identical in three successive generations. From this data it is reasonable to conclude that, with respect to the gene for neck length, the population is in Hardy-Weinberg equilibrium.
a. true b. false
Normally, concentrations of wastes, such as urea, are
Select one: a. high in urine in comparison to plasma. b. high in the filtrate but low in urine. c. in trace amounts in urine but are high in blood. d. not in the filtrate but are present in low concentrations in the urine. e. only found in the excretory organs where they originate from metabolism.