Groups of three consecutive bases along the DNA of a gene have the code for one ________.
A. amino acid
B. nucleotide
C. purine
D. protein
Answer: A
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Lyme disease is a bacterial disease that is transmitted to humans when a black-legged tick that
is infected with the bacterium bites and feeds on a human. In this scenario, the tick is an example of a __________.
a. cyst b. vector c. primary host d. pathogen
A molecule is considered a nutrient if it ______.
a) provides energy b) provides building blocks for the body/cell c) helps regulate the metabolic processes of the body d) A and C are both correct but not B e) A, B, and C are all correct.
Cartilage is well supplied with blood vessels
Indicate whether the statement is true or false
Which of the following is a way that allopolyploidy can most directly cause speciation?
A) It can improve success in island habitats. B) It can overcome hybrid sterility. C) It can change the mating behavior of animals. D) It can generate geographic barriers. E) It can produce heterochrony.