If it takes 40 minutes to replicate the entire E. coli chromosome, how can the cell divide as quickly as every 20 minutes?
What will be an ideal response?
Ans: Rounds of DNA replication must be overlapping. If a cell lineage is rapidly dividing, when a particular cell divides, the two segregating chromosomes are already partially replicated.
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Which of the following attributes is related to the arboreal ancestry of humans?
A. an opposable thumb B. binocular vision C. grasping fingers D. visual acuity E. All of the choices provided are correct
__________ refers to an individual’s observable
traits. Fill in the blank(s) with the appropriate word(s).
What are the main causes of biodiversity loss?
A) Habitat destruction, overharvesting, and invasive species B) Invasive species, pollution, and climate change C) Habitat destruction, invasive species, and climate change D) Habitat destruction, overharvesting, invasive species, pollution, and climate change
Which of the following is considered a reverse mutation that will restore the wild type phenotype?
A. Mutation to a different base sequence, but one that restores the amino acid sequence in the protein to the wild type sequence B. True reversion back to the wild type base sequence C. A mutation that restores the function of a protein, even though it does not restore the base sequence or the amino acid sequence to the wild type D. All of the choices are correct.