Even though nature has been carrying out genetic
experiments for 3.8 billion years, what may be the
unsettling aspect of biologists’ foray into this
endeavor is
a. that humans are now “playing god.”
b. uncertainty about our ability to evaluate the
impact
c. that scientists really do not know what they are
doing in this area.
d. the number of dangerous plants and animals that
have been produced.
e. the new diseases that could be created.
Answer: b
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A reciprocal exchange in which a pair of DNA with the same nucleotide sequence break and rejoin in a crossover is called ________ recombination.
A. site-specific B. replicative C. homologous D. None of the choices are correct.
In marine and freshwater environments, the penetration of sunlight and the mixing of nutrients, oxygen, and waste products are the dominant factors controlling the microbial community.
Answer the following statement true (T) or false (F)
Mature red blood cells have no nucleus or mitochondria
Indicate whether the statement is true or false
DNA is made of:
A) fatty acids. B) nucleotides. C) transcriptase. D) amino acids. E) four interconnected carbon rings