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Home Q & A Board Biology-Related Homework Help Cell Biology
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123123456 123123456
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6 years ago
The most widely used molecule in sequence-based evolutionary analyses are ________ genes.
 
  A) ATPase
  B) electron transport
  C) SSU rRNA
  D) tRNA


A sequence variant of a gene is called a(n)
 
  A) allele.
  B) mutation.
  C) nucleotide polymorphism.
  D) ribotype.


Which of the following is an assumption used in the molecular clock approach?
 
  A) Nucleotide changes accumulate in a sequence in proportion to time.
  B) Nucleotide changes are generally NOT transferred to progeny.
  C) Nucleotide changes are NOT random.
  D) Nucleotide changes are subject to intense selective pressure.


Chemical reactions involving ________ have been proposed as energy-yielding reactions for primitive organisms.
 
  A) Fe, O2, and H2
  B) S, O2, and H2
  C) S, and O2
  D) S, and H2


The earliest RNA probably functioned in
 
  A) catalysis.
  B) self-replication.
  C) both catalysis and self-replication.
  D) neither catalysis nor self-replication.
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charliegolfcharliegolf
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6 years ago
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123123456 Author
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6 years ago
Thanks for your help!!
klyn
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Yesterday
This site is awesome
homework1
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2 hours ago
Brilliant ツ
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