A shortened snout and a relatively flat face are associated with
A. bilateral symmetry and aquatic reproduction.
B. a decline in the importance of smell and an increase in reliance on vision.
C. a terrestrial life style.
D. a decline in the importance of vision and an increase in reliance on smell.
Answer: B
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Regardless of the DNA polymerase used in PCR, such as Taq or Pfu, they all have an inherent inability to perfectly copy the template strand, which means the polymerases themselves occasionally make mutations in the sequences they copy
Indicate whether the statement is true or false.
Twitching or gliding motility involves
A. type IV pili. B. movement of slime. C. axial fibrils. D. both type IV pili and movement of slime can be involved in twitching or gliding motility.
A portion (location) of DNA that encodes a specific protein is a
Examine this image of chromosomes and identify the structural components.
A. kinetochore.
B. centromere.
C. chromatid.
D. chromosome.
E. gene.
Which of these is a thiol?
A. -SH B. -COH C. -OH D. -NH2 E. none of the above