Which of the following DNA strands can form a DNA duplex by pairing with itself at each position?
(a) 5?-AAGCCGAA-3?
(b) 5?-AAGCCGTT-3?
(c) 5?-AAGCGCAA-3?
(d) 5?-AAGCGCTT-3?
(d)
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A high school student in Nepal is accepted—and eventually attends—college in the United States. His diet goes from one that is rich in vegetables and grains to one that primarily consists of meat and sugars
What will happen to the bacterial composition of his intestines? A. There will be more Firmicutes inhabiting his intestinal tract. B. There will be more Bacteroidetes inhabiting his intestinal tract. C. Nothing will happen; there is no relationship between bacteria in the intestines and diet. D. Bacteria will no longer inhabit his intestines.
Bread wheat (2n=42), which is a staple food for about a third of the world's population, evolved from two wheat-like
ancestors (both 2n=42); therefore, bread wheat is a ____ organism
a. diploid b. hexaploid c. triploid d. tetraploid e. tetraploid
Cancer does not typically follow a Mendelian pattern of inheritance because it is usually caused by
A) two gene variants, one dominant and one recessive, and no environmental input. B) specific combinations of alleles and an environmental factor. C) specific combinations of an environmental factor and one dominant gene variant. D) genes that cause death before birth.
In general, population growth ____
a. is limited by only one factor at a time b. increases arithmetically c. increases indefinitely d. is limited by the carrying capacity e. is represented by a minimum of two different sizes