Although Darwin and Wallace understood the central importance of heritability among organisms to
the process of evolution, they could not explain how new variations arose or how they were passed to
the next generation.
Indicate whether the statement is true or false.
ANS: F, variability
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Cystic fibrosis is the result of a malfunction of a cellular ABC transporter that transports
A) Cl?. B) amino acids. C) vitamin B12. D) glucose. E) a hydrophobic drug.
Organisms that can grow with or without oxygen present are
A) obligate aerobes. B) facultative anaerobes. C) aerotolerant anaerobes. D) obligate anaerobes. E) either facultative anaerobes or aerotolerant anaerobes.
You have isolated a prokaryotic cell. The first step in identification is a(n)
A) Gram stain. B) lactose fermentation test. C) endospore stain. D) flagella stain. E) DNA fingerprint.
Modular portions of a protein that fold into stable conformations with specific functional capabilities are referred to as ________
A) protein chaperones B) protein secondary structures C) protein quaternary structures D) protein domains E) protein subunits