The substitution of one base pair for another in double-stranded DNA is called a(n):
A. silent mutation.
B. risk factor.
C. allele.
D. heterozygote advantage.
E. point mutation.
E
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Two neighboring Caribbean islands harbor iguana populations. One island (island
A) has a total iguana population of 800, while the other (island B) has a population less than half that size, numbering 250. On island A, the frequency of an allele p is estimated at 0.75, while this same allele is present at a frequency of 0.90 on island B. During a hurricane tracking across the islands, a group of about 100 iguanas get rafted from island A to island B. What effect does this have on the frequency of allele p on island B?
Which of the following lists the levels of biological organization in order from simplest to most complex?
a. cell, cardiac muscle, heart, cardiovascular system, human b. cardiac muscle, cell, human, heart, cardiovascular system c. heart, human, cell, cardiac muscle, cardiovascular system d. cell, heart, human, cardiovascular system, cardiac muscle e. human, heart, cardiovascular system, cardiac muscle, cell
By definition, a(n) endemic species is a species that is not found anywhere else in the world. Indicate whether the statement is true or false
As they emerge from the ribosome, signal sequences are recognized and bound by a
a. tRNA. b. signal peptidase. c. signal recognition particle. d. SRP receptor.