The vast majority of species within a food web are only separated from other species by ________ connection(s)
a. 5
b. 1
c. 4
d. 6
e. 3
e
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Which of the following complicates the generation of an evolutionary tree?
A. vertical gene transfer B. linkage analysis C. changes in mitochondrial DNA D. carcinogens in the environment E. multiple birth (e.g., twins)
A human infection that results from a microorganism that primarily infects animal populations is referred to as a(n) _________ infection
a. accidental b. zoonotic c. secondary d. vector
Identify the incorrect statement from below
A. Donor (TetR) and Recipient (StrepR) grow only on those antibiotic plates to which they are resistant. B. Donor and Recipient being sensitive to Streptomycin and Tetracycline respectively will not grow on those antibiotic plates. C. Both parental strains do not grow on the double antibiotic plate as it contains one or the other antibiotic to which they are sensitive. D. There is no gene transfer of antibiotic resistance from F factor of donor to recipient. E. A bacterial lawn is also seen on plating conjugated sample on the individual antibiotic plates.
What is the composition of a Barr body?
What will be an ideal response?