Which of the following is NOT a function of the conducting zone of the respiratory system?
a. Humidifying air
b. Warming air
c. Gas exchange
d. Mucus secretion
e. Filtration
Answer: c. Gas exchange
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Imagine a hypothetical population of elephants and rabbits in which both species remain at carrying capacity over many generations. Who would have more offspring that survive to be adults and reproduce during their lifetime, a mating pair of elephants or a mating pair of rabbits? Explain your answer.
What will be an ideal response?
Mutations are more likely to occur in repeated DNA sequences because
A) these bases are unstable. B) bases in the strand can form base pairs, generating loops that interfere with replication and repair enzymes. C) the repeats hold onto the replication enzymes, causing base mismatches. D) the repeats attract and bind to mutagens, increasing the mutation rate.
In Meselson and Stahl's experiment, what kind of DNA molecules would be found after four replication cycles?
A) Only heavy DNA (15N-15N) B) Only intermediate DNA (15N-14N) C) Only light DNA (14N-14N) D) Both heavy (15N-15N) and light DNA (14N-14N) E) Both heavy (15N-15N) and intermediate DNA (15N-14N)
The application called multiple strand displacement amplification is a powerful tool because ________.
A. it allows single-cell genomic sequencing that can analyze uncultivated microorganisms B. it provides data on the pathogenic nature of the microorganism C. it provides errorless sequencing results for that microorganism D. it identifies the transcriptome of the microorganism